JP2015095455A - Negative electrode material of on-vehicle energy storage lithium ion battery, and manufacturing method thereof - Google Patents
Negative electrode material of on-vehicle energy storage lithium ion battery, and manufacturing method thereof Download PDFInfo
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- 239000007773 negative electrode material Substances 0.000 title claims abstract description 48
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 47
- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 52
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 36
- 239000010439 graphite Substances 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 27
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 229910021382 natural graphite Inorganic materials 0.000 claims description 33
- 239000006258 conductive agent Substances 0.000 claims description 29
- 239000003575 carbonaceous material Substances 0.000 claims description 25
- 239000011247 coating layer Substances 0.000 claims description 25
- 230000001788 irregular Effects 0.000 claims description 25
- 239000004020 conductor Substances 0.000 claims description 19
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 14
- 230000005347 demagnetization Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 14
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
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- 239000007790 solid phase Substances 0.000 claims description 9
- 239000002904 solvent Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000006185 dispersion Substances 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 230000004048 modification Effects 0.000 claims description 8
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- 239000011325 microbead Substances 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 5
- 239000004917 carbon fiber Substances 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
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- 229920001467 poly(styrenesulfonates) Polymers 0.000 claims description 5
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- 239000011271 tar pitch Substances 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 4
- 239000010410 layer Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 239000011295 pitch Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 229960002796 polystyrene sulfonate Drugs 0.000 claims description 3
- 239000011970 polystyrene sulfonate Substances 0.000 claims description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 238000010000 carbonizing Methods 0.000 claims description 2
- 229910052593 corundum Inorganic materials 0.000 claims description 2
- 239000010431 corundum Substances 0.000 claims description 2
- YDEXUEFDPVHGHE-GGMCWBHBSA-L disodium;(2r)-3-(2-hydroxy-3-methoxyphenyl)-2-[2-methoxy-4-(3-sulfonatopropyl)phenoxy]propane-1-sulfonate Chemical compound [Na+].[Na+].COC1=CC=CC(C[C@H](CS([O-])(=O)=O)OC=2C(=CC(CCCS([O-])(=O)=O)=CC=2)OC)=C1O YDEXUEFDPVHGHE-GGMCWBHBSA-L 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 239000011734 sodium Substances 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 229940006186 sodium polystyrene sulfonate Drugs 0.000 claims description 2
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 2
- 229920001732 Lignosulfonate Polymers 0.000 claims 1
- 239000006229 carbon black Substances 0.000 claims 1
- 239000002923 metal particle Substances 0.000 claims 1
- 125000001624 naphthyl group Chemical group 0.000 claims 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims 1
- 239000002861 polymer material Substances 0.000 claims 1
- 230000001568 sexual effect Effects 0.000 claims 1
- 229910001928 zirconium oxide Inorganic materials 0.000 claims 1
- 238000011084 recovery Methods 0.000 abstract description 7
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000002715 modification method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 17
- 238000003756 stirring Methods 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 239000012298 atmosphere Substances 0.000 description 9
- 239000007795 chemical reaction product Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 229910001873 dinitrogen Inorganic materials 0.000 description 9
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- 239000011230 binding agent Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000006245 Carbon black Super-P Substances 0.000 description 3
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- 239000000203 mixture Substances 0.000 description 3
- 239000004925 Acrylic resin Substances 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 2
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000007774 positive electrode material Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910001290 LiPF6 Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
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- 239000011888 foil Substances 0.000 description 1
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- 238000009776 industrial production Methods 0.000 description 1
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- 150000002500 ions Chemical class 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- -1 methylene dinaphthyl Chemical group 0.000 description 1
- 229910021392 nanocarbon Inorganic materials 0.000 description 1
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- 238000003825 pressing Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1393—Processes of manufacture of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
Description
本発明はリチウムイオン電池材料分野に関する。具体的には、車載用及びエネルギー貯蔵用リチウムイオン電池負極材料及びその製造方法に関する。 The present invention relates to the field of lithium ion battery materials. Specifically, the present invention relates to a lithium ion battery negative electrode material for on-vehicle use and energy storage and a method for producing the same.
従来、商用リチウムイオン電池用負極材料は主に黒鉛系材料であり、黒鉛を負極材料とする場合の理論比容量は３７２ｍＡｈ／ｇに達する。しかし充放電レート特性が悪く、電解質との相容性や低温特性が悪いため、リチウムイオン電池の車載及びエネルギー貯蔵分野での開発進捗に直接影響を与える。 Conventionally, negative electrode materials for commercial lithium ion batteries are mainly graphite-based materials, and the theoretical specific capacity when graphite is used as the negative electrode material reaches 372 mAh / g. However, the charge / discharge rate characteristics are poor and the compatibility with the electrolyte and the low temperature characteristics are poor, which directly affects the development progress of lithium ion batteries in the vehicle and energy storage fields.
黒鉛系材料に対して被覆改質処理を行うことにより、材料の可逆容量、サイクル特性及び電解液との相容性を大幅に向上させることができるが、被覆材料であるピッチ又は樹脂又は高分子物質の導電特性は黒鉛より悪いため、電極材料の導電特性も悪くなり、且つ低温特性は良くない。本発明者らは鋭意検討を行なった結果、導電剤の添加は被覆黒鉛材料の導電特性を効果的に向上させるとともに、電極材料と電解液の相容性を向上させることができることを発見した。 By performing a coating modification process on the graphite-based material, the reversible capacity, cycle characteristics, and compatibility with the electrolytic solution of the material can be greatly improved. Since the conductive property of the substance is worse than that of graphite, the conductive property of the electrode material is also deteriorated, and the low temperature property is not good. As a result of intensive studies, the present inventors have found that the addition of a conductive agent can effectively improve the conductive properties of the coated graphite material and improve the compatibility between the electrode material and the electrolyte.
特許文献１は液相混合、乾燥、炭素化処理、高温処理、複合化などの工程を含むリチウムイオン電池負極材料の製造方法を開示している。 Patent document 1 is disclosing the manufacturing method of the lithium ion battery negative electrode material including processes, such as liquid phase mixing, drying, carbonization processing, high temperature processing, and compounding.
導電性材料の添加はある程度黒鉛材料の導電特性を向上させることができるが、導電剤の分散が難しく、生産効率が低い等の問題が存在する。また分散された導電剤を適時に使用しないと、更に二次凝集を引き起こす。従って導電剤の使用効率及び材料の均一性に影響を与え、リチウムイオン電池のサイクル特性とレート特性が低下する。 The addition of the conductive material can improve the conductive properties of the graphite material to some extent, but there are problems such as difficulty in dispersing the conductive agent and low production efficiency. Further, if the dispersed conductive agent is not used in a timely manner, secondary aggregation is caused. Accordingly, the use efficiency of the conductive agent and the uniformity of the material are affected, and the cycle characteristics and rate characteristics of the lithium ion battery are deteriorated.
前述の特許文献１の負極材料の製造方法は炭素化処理と高温処理を含み、前記複合化は順次混合と融合を含むため、エネルギー消費やコストが高く、操作が複雑であり、産業としての生産性に不利である。 The manufacturing method of the negative electrode material described in Patent Document 1 includes carbonization treatment and high-temperature treatment. Since the composite includes sequential mixing and fusion, energy consumption and cost are high, operation is complicated, and production as an industry. It is disadvantageous to sex.
従って、導電特性、サイクル特性及びレート特性が優れ、且つ製造方法が簡単で、生産コストが低いリチウムイオン電池負極材料を開発することは所属分野の技術難題である。 Therefore, it is a technical challenge in the field to which it belongs to develop a lithium ion battery negative electrode material that is excellent in conductive characteristics, cycle characteristics and rate characteristics, has a simple manufacturing method, and has low production costs.
従来技術の不足に対して、本発明の目的の１つ目は車載用及びエネルギー貯蔵用リチウムイオン電池負極材料の製造方法を提供することであり、
有機炭素源で黒鉛系材料を被覆して、混合材料を得る工程（１）、
工程（１）で得られた混合材料を、５００〜１８００℃で炭素化処理を行い、表面に不規則の炭素材料被覆層を有する黒鉛材料を得る工程（２）、
工程（２）で得られた材料と導電性材料に対して、メカニカルミル法で改質処理を行う工程（３）、及び
篩分け、消磁してリチウムイオン電池負極材料を得る工程（４）を含み、
好ましくは、前記黒鉛系材料は天然黒鉛、人造黒鉛又はカーボンマイクロビーズのうちの１種又は少なくとも２種の組合せであり、好ましくは、前記黒鉛系材料の固定炭素含有率は９９.９％以上であり、アスペクト比は１.０〜２.５であり、平均粒径は１〜３０μｍ、Ｄmax≦４０.０μｍであり、比表面積は２.０〜２０.０ｍ2／ｇであり、粉末プレス密度は１.４５〜２.０５ｇ／ｃｍ3であり、層面間隔（ｄ002）は０.３３５４〜０.３３６３ｎｍであり、菱形構造（３Ｒ）含有量は１.０〜３５.０％であり、ＩD／ＩG（面積比）は０.１〜１.０であり、Ｉ110／Ｉ004は０.０５〜０.９５であり、Ｌｃは２００.０〜１０００.０ｎｍであり、Ｌａは８００.０〜１８００.０ｎｍであり、磁性物質含有量は０.５ｐｐｍ以下であり、金属異物粒子の大きさは１００.０μｍ以下であり、プレス密度が１.５ｇ／ｃｃである場合の粉末導電率は５０.０〜８００.０Ｓ／ｃｍである。
In contrast to the shortage of the prior art, the first object of the present invention is to provide a method for producing a negative electrode material for lithium ion battery for vehicle use and energy storage,
Coating a graphite material with an organic carbon source to obtain a mixed material (1);
A step of carbonizing the mixed material obtained in step (1) at 500 to 1800 ° C. to obtain a graphite material having an irregular carbon material coating layer on the surface (2);
A step (3) of performing a modification treatment by a mechanical mill method on the material and the conductive material obtained in the step (2), and a step (4) of obtaining a lithium ion battery negative electrode material by sieving and demagnetizing. Including
Preferably, the graphite material is one or a combination of at least two of natural graphite, artificial graphite or carbon microbeads, and preferably the fixed carbon content of the graphite material is 99.9% or more. Yes, the aspect ratio is 1.0 to 2.5, the average particle size is 1 to 30 μm, D max ≦ 40.0 μm, the specific surface area is 2.0 to 20.0 m 2 / g, and the powder press The density is 1.45 to 2.05 g / cm 3 , the layer spacing (d 002 ) is 0.3354 to 0.3363 nm, and the rhomboid structure (3R) content is 1.0 to 35.0%. , I D / I G (area ratio) is 0.1 to 1.0, I 110 / I 004 is 0.05 to 0.95, Lc is 20.0 to 10.0 nm, La Is 80.0 to 180.0 nm, and the magnetic substance content is 0.5 ppm or less. The powder conductivity is 50.0-80.0 S / cm when the size is 100.0 μm or less and the press density is 1.5 g / cc.
好ましくは、前記有機炭素源はタールピッチ、石油ピッチ、メソピッチ、高分子材料又は重合体のうちの１種又は少なくとも２種の組合せである。 Preferably, the organic carbon source is one or a combination of at least two of tar pitch, petroleum pitch, meso pitch, polymeric material or polymer.
好ましくは、前記導電性材料はナノ導電剤及び／又は導電性黒鉛であり、好ましくは、前記ナノ導電剤はＣＮＴｓ、炭素繊維、ナノ黒鉛又はグラフェンのうちの１種又は少なくとも２種の組合せであり、好ましくは、前記ナノ導電剤の平均寸法（Ｄ50）は１０〜６００.０ｎｍであり、比表面積ＳＳＡは２.０〜６０.０ｍ2／ｇであり、好ましくは、前記ナノ導電剤の平均寸法は１０.０〜３００.０ｎｍであり、好ましくは、前記ＣＮＴと炭素繊維の直径は１〜３００ｎｍであり、長さは１〜２０μｍであり、好ましくは、前記グラフェンの黒鉛層の数は１〜１００であり、好ましくは、前記ナノ導電剤はナノ導電性液体の状態で存在し、好ましくは、前記ナノ導電性液体におけるナノ導電剤の含有量は０.５〜２０ｗｔ％であり、好ましくは、前記ナノ導電性液体における分散溶媒は水、メタノール、エタノール、アセトン又はクロロホルムのうちの１種又は少なくとも２種の組合せである。 Preferably, the conductive material is a nano conductive agent and / or conductive graphite, and preferably the nano conductive agent is one or a combination of at least two of CNTs, carbon fiber, nanographite, or graphene. Preferably, the nano conductive agent has an average dimension (D 50 ) of 10 to 60.0 nm and a specific surface area SSA of 2.0 to 60.0 m 2 / g. The dimension is 10.0 to 300.0 nm, preferably the diameter of the CNT and carbon fiber is 1 to 300 nm and the length is 1 to 20 μm, preferably the number of graphite layers of the graphene is 1 To 100, preferably, the nano-conductive agent is present in the form of a nano-conductive liquid, preferably the content of the nano-conductive agent in the nano-conductive liquid is 0.5 to 20 wt%, preferably , Dispersion solvent in serial nano conductive liquid is one or at least two kinds of combination of water, methanol, ethanol, acetone or chloroform.
好ましくは、前記導電性材料は導電性天然黒鉛粉末、導電性人造黒鉛粉末又はナノ導電性炭素ブラック（Ｓｕｐｅｒ−Ｐ）のうちの１種又は少なくとも２種の組合せであり、好ましくは、前記導電性材料はシート状又はブロック状を呈し、長短径比は１.３〜４.５であり、平均粒径は０.５〜１２.０μｍであり、比表面積ＳＳＡは２.０〜６０.０ｍ2／ｇである。 Preferably, the conductive material is one or a combination of at least two of conductive natural graphite powder, conductive artificial graphite powder or nano-conductive carbon black (Super-P), preferably the conductive material The material is in the form of a sheet or block, the major axis to minor axis ratio is 1.3 to 4.5, the average particle diameter is 0.5 to 12.0 μm, and the specific surface area SSA is 2.0 to 60.0 m 2. / G.
好ましくは、工程（１）に記載の被覆は固相被覆又は液相被覆である。 Preferably, the coating described in step (1) is a solid phase coating or a liquid phase coating.
本発明における固相被覆は所属分野の既知技術であり、当業者は必要に応じて適当な技術パラメータを選択できる。前記固相被覆の非限定的な例は、有機炭素源と黒鉛系材料を混合機の中に置き、温度を１５℃〜８０℃に制御し、４００〜２０００ｒｐｍの回転速度で、１〜３００分間処理し、混合材料を得る。前記混合機は高速改質ＶＣ混合機、コーンミキサー又は混練機であるということを含む。 The solid phase coating in the present invention is a known technique in the field to which the person belongs, and those skilled in the art can select appropriate technical parameters as necessary. Non-limiting examples of the solid phase coating include placing an organic carbon source and a graphite-based material in a mixer, controlling the temperature at 15 ° C. to 80 ° C., and rotating at 400 to 2000 rpm for 1 to 300 minutes. Process to obtain mixed material. It includes that the mixer is a high speed reforming VC mixer, cone mixer or kneader.
本発明における液相被覆は所属分野の既知技術であり、当業者は必要に応じて適合な技術パラメータを選択できる。前記液相被覆の非限定的な例として以下を挙げる。有機炭素源を溶媒の中に加え、高速ミキサーで液相混合を行い、攪拌回転速度が３０００〜５０００ｒｐｍであり、攪拌時間が２０〜６０分間であり、温度が８０〜９０℃であり、その後黒鉛基体材料を前記混合物の中に加え、有機炭素源と黒鉛基体材料の質量比は（１：９）〜（２：８）であり、続けて高速ミキサーで液相混合を行い、攪拌回転速度は３０００〜５０００ｒｐｍであり、攪拌時間は１２０〜１８０分間であり、使用される溶媒と黒鉛基体材料の質量比は２〜１.２であり、乾燥して、混合材料を得る、前記溶媒はエタノール又はメタノールであり、前記液相被覆における乾燥は噴霧乾燥機で行い、噴霧乾燥機の入口温度は１５０〜３５０℃であり、出口温度は２０〜２５０℃であり、圧力は１０〜１００ＭＰａであり、供給頻度は１０〜１００Ｈｚであり、攪拌回転速度は３０００〜５０００ｒｐｍであり、攪拌時間は１２０〜１８０分間であり、使用される溶媒と黒鉛基体材料の質量比は２〜１.２であり、乾燥して、混合材料を得る、前記溶媒はエタノール又はメタノールである。 The liquid phase coating in the present invention is a known technique in the field to which the present invention pertains, and those skilled in the art can select suitable technical parameters as required. The following are given as non-limiting examples of the liquid phase coating. An organic carbon source is added to the solvent, liquid phase mixing is performed with a high-speed mixer, the stirring rotation speed is 3000 to 5000 rpm, the stirring time is 20 to 60 minutes, the temperature is 80 to 90 ° C., and then graphite The base material is added to the mixture, and the mass ratio of the organic carbon source to the graphite base material is (1: 9) to (2: 8), followed by liquid phase mixing with a high-speed mixer, and the stirring rotation speed is It is 3000-5000 rpm, the stirring time is 120-180 minutes, the mass ratio of the solvent used and the graphite base material is 2-1.2, and is dried to obtain a mixed material. The solvent is ethanol or It is methanol, and the drying in the liquid phase coating is performed by a spray dryer, the inlet temperature of the spray dryer is 150 to 350 ° C., the outlet temperature is 20 to 250 ° C., the pressure is 10 to 100 MPa, and the supply The frequency is 10 to 100 Hz, the stirring rotation speed is 3000 to 5000 rpm, the stirring time is 120 to 180 minutes, the mass ratio of the solvent used and the graphite substrate material is 2 to 1.2, and drying is performed. Thus, the solvent for obtaining the mixed material is ethanol or methanol.
好ましくは、工程（２）に記載の炭素化処理温度は６００〜１６００℃であり、特に好ましくは７００〜１５００℃である。 Preferably, the carbonization temperature described in the step (2) is 600 to 1600 ° C, particularly preferably 700 to 1500 ° C.
好ましくは、工程（３）に記載のメカニカルミル法での改質処理はボールミリング処理、融合処理又は高速ナノ分散処理であり、好ましくは、前記ボールミリング改質処理時間は５.０分間以上であり、処理速度は２００〜４０００ｒ／ｍｉｎであり、前記ボールミリング改質処理時間は６.０分間、８.０分間、１０.０分間、１５.０分間、２０.０分間、５０.０分間、１００.０分間、２００.０分間、３００.０分間、５００.０分間、８００.０分間、１０００.０分間、１１００.０分間、１１５０.０分間、１１８０.０分間、１１９０.０分間、１１９５.０分間又は１１９９.０分間等であっても良く、好ましくは５.０〜１２００.０分間であり、前記ボールミリング改質処理速度は２１０ｒ／ｍｉｎ、２２０ｒ／ｍｉｎ、２５０ｒ／ｍｉｎ、３００ｒ／ｍｉｎ、５００ｒ／ｍｉｎ、１０００ｒ／ｍｉｎ、１５００ｒ／ｍｉｎ、２０００ｒ／ｍｉｎ、２５００ｒ／ｍｉｎ、３０００ｒ／ｍｉｎ、３５００ｒ／ｍｉｎ、３８００ｒ／ｍｉｎ、３９００ｒ／ｍｉｎ又は３９５０ｒ／ｍｉｎ等であっても良く、好ましくは、前記ボールミリング改質処理に採用したボールの直径は０.１〜３.０ｍｍであり、ボールの種類はアルミナボール又はコランダムボールであり、好ましくは、前記融合処理時間は２０.０〜８００.０分間であり、回転速度は８００〜３０００ｒ／ｍｉｎであり、キャビティ隙間は０.１〜２.０ｃｍであり、温度は１０〜８０℃であり、好ましくは、前記融合処理時間は２０.０〜３００.０分間であり、好ましくは、前記融合処理回転速度は８００〜２６００ｒ／ｍｉｎであり、好ましくは、前記融合処理のキャビティ隙間は０.１〜１.０ｃｍであり、好ましくは、前記融合処理温度は２０〜６０℃であり、好ましくは、前記高速ナノ分散時間は２０.０〜１２００.０分間であり、回転速度は２００〜８０００ｒ／ｍｉｎであり、好ましくは、前記高速ナノ分散は分散剤を採用し、好ましくは、前記導電性材料と分散剤の質量比は（１：０.１）〜（１：１）であり、特に好ましくは（１：０.３）〜（１：０.８）であり、好ましくは、前記分散剤はナトリウムカルボキシメチルセルロース、リグニンスルホン酸ナトリウム、リグニンスルホン酸マグネシウム、ポリスチレンスルホン酸ナトリウム、ポリスチレンスルホン酸アンモニウム、メチレンジナフチルスルホン酸ナトリウム又はポリアクリルアミドのうちの１種又は少なくとも２種の組合せである。 Preferably, the modification process by the mechanical mill method described in the step (3) is a ball milling process, a fusion process or a high-speed nano-dispersion process. Preferably, the ball milling modification process time is 5.0 minutes or more. Yes, the treatment speed is 200 to 4000 r / min, and the ball milling reforming treatment time is 6.0 minutes, 8.0 minutes, 10.0 minutes, 15.0 minutes, 20.0 minutes, 50.0 minutes. , 100.0 minutes, 200.0 minutes, 300.0 minutes, 50.0 minutes, 80.0 minutes, 100.0 minutes, 110.0 minutes, 110.0 minutes, 110.0 minutes, 110.0 minutes 1199.0 minutes or 1199.0 minutes, and preferably 5.0 to 120.0 minutes, and the ball milling reforming treatment speed is 210 r / min, 220 r / min, 250 r / min, 30 r / min, 500 r / min, 1000 r / min, 1500 r / min, 2000 r / min, 2500 r / min, 3000 r / min, 3500 r / min, 3800 r / min, 3900 r / min, 3950 r / min, etc. Preferably, the diameter of the ball employed in the ball milling reforming treatment is 0.1 to 3.0 mm, the type of the ball is an alumina ball or a corundum ball, and preferably the fusion treatment time is 20.0 to 80.0 minutes, rotation speed is 800-3000 r / min, cavity gap is 0.1-2.0 cm, temperature is 10-80 ° C., preferably the fusion treatment time is 20. 0 to 300.0 minutes, preferably, the fusion processing rotation speed is 800 to 2600 r / min, Preferably, the fusion process has a cavity clearance of 0.1 to 1.0 cm, preferably the fusion process temperature is 20 to 60 ° C., and preferably the high speed nano dispersion time is 20.0 to 1200. 0 minutes, and the rotational speed is 200 to 8000 r / min. Preferably, the high-speed nano-dispersion employs a dispersant, and preferably the mass ratio of the conductive material to the dispersant is (1: 0.1). ) To (1: 1), particularly preferably (1: 0.3) to (1: 0.8). Preferably, the dispersant is sodium carboxymethyl cellulose, sodium lignin sulfonate, lignin sulfonic acid. One of magnesium, sodium polystyrene sulfonate, ammonium polystyrene sulfonate, sodium methylene dinaphthyl sulfonate or polyacrylamide or A combination of at least two.
好ましくは、工程（４）に記載の消磁の磁気誘導強度は３０００〜３００００Ｇｓであり、処理温度は１０〜８０℃であり、消磁時間は１０〜１２０ｓである。 Preferably, the magnetic induction strength of demagnetization described in the step (4) is 3000 to 30000 Gs, the processing temperature is 10 to 80 ° C., and the demagnetization time is 10 to 120 s.
本発明の目的の２つ目は車載用及びエネルギー貯蔵用リチウムイオン電池負極材料を提供することであり、本発明の方法により製造した前記負極材料は、電解液との浸潤性が良く、電子導電率が高く、低温レート特性及びサイクル特性が優れる。 The second object of the present invention is to provide a lithium ion battery negative electrode material for on-vehicle use and energy storage, and the negative electrode material produced by the method of the present invention has good infiltration with an electrolyte solution, and electronic conductivity. The rate is high and the low temperature rate characteristics and cycle characteristics are excellent.
前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料は黒鉛系材料、基体表面における不規則な炭素材料被覆層及び導電性材料からなり、且つ黒鉛粒子の表面に導電性材料を均一にコーティングして嵌め込む。 The lithium ion battery negative electrode material for in-vehicle use and energy storage is composed of a graphite material, an irregular carbon material coating layer on the surface of the substrate and a conductive material, and the surface of the graphite particles is uniformly coated with a conductive material and fitted. Include.
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における導電性材料の含有量は０.１〜２０.０ｗｔ％であり、更に好ましくは０.５〜１８.０ｗｔ％であり、特に好ましくは１〜１５.０ｗｔ％である。 Preferably, the content of the conductive material in the in-vehicle and energy storage lithium ion battery negative electrode material is 0.1 to 20.0 wt%, more preferably 0.5 to 18.0 wt%, and particularly preferably. Is 1 to 15.0 wt%.
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における不規則な炭素材料被覆層の含有量は０.１〜２０.０ｗｔ％であり、更に好ましくは０.５〜１８.０ｗｔ％であり、特に好ましくは１〜１５.０ｗｔ％であり、
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における不規則な炭素材料被覆層と黒鉛系材料の質量比は（０.１：１００）〜（２０.０：１００）であり、更に好ましくは（０.５：１００）〜（１８.０：１００）であり、特に好ましくは（０.５：１００）〜（１５.０：１００）である。
Preferably, the content of the irregular carbon material coating layer in the in-vehicle and energy storage lithium ion battery negative electrode material is 0.1 to 20.0 wt%, more preferably 0.5 to 18.0 wt%. Yes, particularly preferably 1 to 15.0 wt%,
Preferably, the mass ratio of the irregular carbon material coating layer to the graphite-based material in the in-vehicle and energy storage lithium ion battery negative electrode material is (0.1: 100) to (20.0: 100), It is preferably (0.5: 100) to (18.0: 100), and particularly preferably (0.5: 100) to (15.0: 100).
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における黒鉛系材料と導電性材料の質量比は（１０：０.０１）〜（１０：１０.０）であり、更に好ましくは（１０：０.１）〜（１０：８.０）であり、特に好ましくは（１０：０.５）〜（１０：６.０）である。 Preferably, the mass ratio of the graphite-based material to the conductive material in the in-vehicle and energy storage lithium ion battery negative electrode materials is (10: 0.01) to (10: 10.0), and more preferably (10 : 0.1) to (10: 8.0), particularly preferably (10: 0.5) to (10: 6.0).
本発明の目的の３つ目は車載用及びエネルギー貯蔵用リチウムイオン電池を提供することであり、前記車載用及びエネルギー貯蔵用リチウムイオン電池は本発明に記載の車載用及びエネルギー貯蔵用リチウムイオン電池負極材料を含む。 The third object of the present invention is to provide a lithium ion battery for vehicle use and energy storage, and the lithium ion battery for vehicle use and energy storage is the lithium ion battery for vehicle use and energy storage according to the present invention. Includes negative electrode material.
本発明は、従来の技術に比べて、メカニカルミル法での改質処理で、ナノ導電剤及び／又は導電性黒鉛を均一に黒鉛粒子表面にコーティングして嵌め込み、且つナノ炭素を黒鉛粒子表面にコーティングして嵌め込むことによって、二次凝集を防止する。導電剤と黒鉛粒子の間の作用力を増加させ、導電剤の使用効率と材料表面での安定性を向上させることによって、負極活物質と電解液の相容性を向上させ、リチウムイオン電池の低温特性とレート特性を改善させる。本発明に記載の負極材料の初回充放電効率は９４.０％以上であり、従来の技術サンプルに比べて２.０％以上高く、２５℃低温回復率は９８.０％より高く、従来の技術に比べて８.０％以上向上した。本発明による方法は操作が簡単で、制御し易く、生産コストも低く、産業化生産に適合する。 Compared with the prior art, the present invention is a modification process using a mechanical mill method, in which a nano conductive agent and / or conductive graphite is uniformly coated and fitted on the surface of the graphite particles, and nano carbon is applied to the surface of the graphite particles. Secondary aggregation is prevented by coating and fitting. By increasing the working force between the conductive agent and the graphite particles, and improving the use efficiency of the conductive agent and the stability on the surface of the material, the compatibility of the negative electrode active material and the electrolytic solution is improved, and the lithium ion battery Improve low temperature characteristics and rate characteristics. The initial charge / discharge efficiency of the negative electrode material described in the present invention is 94.0% or more, 2.0% or more higher than the conventional technical sample, and the low temperature recovery rate at 25 ° C. is higher than 98.0%. Compared to technology, it was improved by 8.0% or more. The method according to the invention is simple to operate, easy to control, low in production costs and suitable for industrial production.
本発明を分かりやすくさせるために、以下のように実施例に基づいて説明する。実施例は本発明を理解するためのものだけであり、本発明に対する具体的な限定と見なすべきではない。 In order to make the present invention easier to understand, description will be made based on examples as follows. The examples are only for the purpose of understanding the invention and should not be construed as specific limitations to the invention.
実施例１
炭素含有量が９９.９％以上、粒子径が３〜４０μｍである球状天然黒鉛を、ＶＣ反応釜中に入れ、天然黒鉛との質量比が５：１００である石油ピッチを導入して固相混合し、回転速度は１２００ｒｐｍ、混合時間は９０分間で、混合材料を得る。前記混合材料を、窒素ガスの雰囲気下に配置し、１２００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。メカニカルボールミリングを用いて、ボールミルの回転速度が２００ｒｐｍ、処理時間が４８０分間で表面に不規則な炭素材料被覆層を有する天然黒鉛とナノ導電剤グラフェンを１００：２の質量比で均一に混合した。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径１１.２μｍのリチウムイオン電池黒鉛負極材料を得る。
Example 1
Spherical natural graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm is placed in a VC reaction kettle, and a petroleum pitch having a mass ratio of 5: 100 with natural graphite is introduced to form a solid phase. Mixing is performed at a rotation speed of 1200 rpm and a mixing time of 90 minutes to obtain a mixed material. The mixed material is placed in an atmosphere of nitrogen gas, carbonized at 1200 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. Using mechanical ball milling, natural graphite having an irregular carbon material coating layer on the surface and a nano-conductive agent graphene were uniformly mixed at a mass ratio of 100: 2 with a ball mill rotating speed of 200 rpm and a processing time of 480 minutes. . The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 11. A 2 μm lithium ion battery graphite negative electrode material is obtained.
実施例２
一定量のアクリル酸樹脂を水の中に加え、高速ミキサーで液相混合を行い、攪拌回転速度は３０００ｒｐｍ、攪拌時間は６０分間、温度は９０℃であり、その後炭素含有量が９９.９％以上、粒子径が３〜４０μｍであるブロック状天然黒鉛を前記混合物の中に加え、そのうちアクリル酸樹脂と天然黒鉛の質量比は１５：１００であり、続いて高速ミキサーで液相混合を行い、攪拌回転速度は３０００ｒｐｍ、攪拌時間は１８０分間であり、使用される溶媒水とブロック状天然黒鉛の質量比は２００：１００であり、噴霧乾燥機で乾燥し、入口温度は３５０℃、出口温度は１５０℃、圧力は１００ＭＰａ、供給頻度は１０Ｈｚで、混合材料を得る。得られた混合材料を窒素ガスの雰囲気下に配置し、５００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。表面に不規則な炭素材料被覆層を有するブロック状天然黒鉛とＣＮＴを、１００：９の質量比で融合機にて均一に混合し、そのうち融合機の回転速度が２６００ｒｐｍで、処理時間が９０分間である。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が８.９μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 2
A certain amount of acrylic acid resin is added to water and mixed in a liquid phase with a high-speed mixer. The rotation speed is 3000 rpm, the stirring time is 60 minutes, the temperature is 90 ° C., and the carbon content is 99.9%. As described above, block-like natural graphite having a particle size of 3 to 40 μm is added to the mixture, among which the mass ratio of acrylic resin and natural graphite is 15: 100, followed by liquid phase mixing with a high-speed mixer, The stirring rotation speed is 3000 rpm, the stirring time is 180 minutes, the mass ratio of the solvent water to be used and the block-like natural graphite is 200: 100, it is dried with a spray dryer, the inlet temperature is 350 ° C., and the outlet temperature is A mixed material is obtained at 150 ° C., a pressure of 100 MPa, and a supply frequency of 10 Hz. The obtained mixed material is placed in an atmosphere of nitrogen gas, carbonized at 500 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. Block-like natural graphite having an irregular carbon material coating layer on the surface and CNT are uniformly mixed in a fusion machine at a mass ratio of 100: 9, of which the fusion machine has a rotation speed of 2600 rpm and a processing time of 90 minutes. It is. The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 8 A lithium ion battery graphite negative electrode material having a thickness of 9.9 μm is obtained.
実施例３
炭素含有量が９９.９％以上、粒子径が３〜４０μｍである人造黒鉛を、コーンミキサー中に入れ、人造黒鉛との質量比が４：１００であるメソピッチを導入して固相混合した。回転速度は５０ｒｐｍ、混合時間が３００分間で、混合材料を得る。混合材料を窒素ガスの雰囲気下に配置し、１８００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する人造黒鉛を得る。表面に不規則な炭素材料被覆層を有する人造黒鉛、導電性天然黒鉛粉末、ＳＰを、１００：９：０.１の質量比で融合機にて均一に混合し、融合機の回転速度が８００ｒｐｍで、処理時間が３００分間である。得られた物に対して篩分け、消磁を行い、消磁回数が３回、磁気誘導強度が１００００Ｇｓ、処理温度が１０℃、電磁式ハンマー打撃回数が２０回／秒であり、平均粒径が１４.５μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 3
Artificial graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm was placed in a corn mixer, and meso pitch having a mass ratio of 4: 100 with the artificial graphite was introduced and solid phase mixed. The rotation speed is 50 rpm and the mixing time is 300 minutes, and the mixed material is obtained. The mixed material is placed in an atmosphere of nitrogen gas, carbonized at 1800 ° C., and then the reaction product is cooled to room temperature to obtain artificial graphite having an irregular carbon material coating layer on the surface. Artificial graphite having an irregular carbon material coating layer on the surface, conductive natural graphite powder, and SP are uniformly mixed at a mass ratio of 100: 9: 0.1 in a fusion machine, and the rotation speed of the fusion machine is 800 rpm. The processing time is 300 minutes. The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 14 A lithium ion battery graphite negative electrode material having a thickness of 0.5 μm is obtained.
実施例４
炭素含有量が９９.９％以上、粒子径が３〜４０μｍであるブロック状天然黒鉛を、ＶＣ反応釜に入れ、天然黒鉛との質量比が２０：１００であるタールピッチを導入して固相混合し、回転速度は２０００ｒｐｍ、混合時間は６０分間で、混合材料を得る。前記混合材料を窒素ガスの雰囲気下に配置し、炭素化処理を行い、温度は９５０℃、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。表面に不規則な炭素材料被覆層を有する天然黒鉛、ＳＰ、分散剤を１００：８：３の質量比で高速ナノ分散にて均一に混合し、そのうち高速ナノ分散の回転速度は８０００ｒｐｍ、処理時間は６０分間、分散剤はポリアクリルアミドである。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度が１００００Ｇｓで、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が１７.０μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 4
Block-shaped natural graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm is placed in a VC reaction kettle, and a tar pitch having a mass ratio with natural graphite of 20: 100 is introduced to form a solid phase. Mixing is performed at a rotation speed of 2000 rpm and a mixing time of 60 minutes to obtain a mixed material. The mixed material is placed in an atmosphere of nitrogen gas and subjected to carbonization treatment, the temperature is 950 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. Natural graphite having an irregular carbon material coating layer on the surface, SP, and a dispersant are uniformly mixed at a mass ratio of 100: 8: 3 by high-speed nanodispersion, of which the rotation speed of high-speed nanodispersion is 8000 rpm, treatment time For 60 minutes and the dispersant is polyacrylamide. The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the processing temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is A lithium ion battery graphite negative electrode material having a size of 17.0 μm is obtained.
実施例５
炭素含有量が９９.９％以上、粒子径が３〜４０μｍであるカーボンマイクロビーズを、コーンミキサーに入れ、カーボンマイクロビーズとの質量比が０.１：１００であるタールピッチを導入して固相混合し、回転速度は１２０ｒｐｍ、混合時間は９０分間で、混合材料を得る。前記混合材料を窒素ガスの雰囲気下に配置し、１５００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有するカーボンマイクロビーズを得る。表面に不規則な炭素材料被覆層を有するカーボンマイクロビーズ、導電性天然黒鉛粉末、分散剤を１００：２０：８の質量比で高速ナノ分散にて均一に混合し、そのうち高速ナノ分散の回転速度が５０００ｒｐｍ、処理時間は９０分間、分散剤はナトリウムカルボキシメチルセルロースである。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒で、平均粒径が９.８μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 5
Carbon microbeads having a carbon content of 99.9% or more and a particle diameter of 3 to 40 μm are placed in a cone mixer, and a tar pitch having a mass ratio with the carbon microbeads of 0.1: 100 is introduced to solidify. Phase mixing is performed, the rotation speed is 120 rpm, and the mixing time is 90 minutes to obtain a mixed material. The mixed material is placed in an atmosphere of nitrogen gas and subjected to carbonization treatment at 1500 ° C., and then the reaction product is cooled to room temperature to obtain carbon micro beads having an irregular carbon material coating layer on the surface. Carbon microbeads having an irregular carbon material coating layer on the surface, conductive natural graphite powder, and a dispersant are uniformly mixed at a mass ratio of 100: 20: 8 by high-speed nanodispersion, of which the rotation speed of high-speed nanodispersion Is 5000 rpm, the processing time is 90 minutes, and the dispersing agent is sodium carboxymethylcellulose. The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 9. A lithium ion battery graphite negative electrode material of 8 μm is obtained.
実施例６
一定量のポリエチレンオキシドをジメチルアセトアミド中に加え、高速ミキサーで液相混合を行い、攪拌回転速度は５０００ｒｐｍ、攪拌時間は２０分間、温度は８０℃であり、その後炭素含有量が９９.９％以上、粒子径が３〜４０μｍである球状天然黒鉛を前記混合物中に加え、そのうちポリエチレンオキシドと球状天然黒鉛の質量比が１８：１００であり、続けて高速ミキサーで液相混合を行い、攪拌回転速度は５０００ｒｐｍ、攪拌時間は１２０分間、使用される溶媒のジメチルアセトアミドと球状天然黒鉛の質量比が１２：１００であり、噴霧乾燥機で乾燥し、入口温度は２８０℃、出口温度は１２０℃、圧力は８０ＭＰａ、供給頻度は３０Ｈｚで、混合材料を得る。得られた混合材料を窒素ガスの雰囲気下に配置し、７００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。表面に不規則な炭素材料被覆層を有する天然黒鉛、導電性人造黒鉛粉末、炭素繊維を１００：５：３の質量比でボールミルにて均一に混合し、ボールミルの回転速度は１２００ｒｐｍ、処理時間は１２０分間である。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が１３.８μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 6
A certain amount of polyethylene oxide is added to dimethylacetamide, and liquid phase mixing is performed with a high-speed mixer. The rotation speed is 5000 rpm, the stirring time is 20 minutes, the temperature is 80 ° C., and the carbon content is 99.9% or more. In addition, spherical natural graphite having a particle size of 3 to 40 μm is added to the mixture, and the mass ratio of polyethylene oxide to spherical natural graphite is 18: 100, followed by liquid phase mixing with a high-speed mixer, stirring rotation speed Is 5000 rpm, the stirring time is 120 minutes, the mass ratio of dimethylacetamide, which is the solvent used, and spherical natural graphite is 12: 100, and is dried with a spray dryer, the inlet temperature is 280 ° C., the outlet temperature is 120 ° C., and the pressure Is 80 MPa, the supply frequency is 30 Hz, and a mixed material is obtained. The obtained mixed material is placed in an atmosphere of nitrogen gas, carbonized at 700 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. Natural graphite having an irregular carbon material coating layer on the surface, conductive artificial graphite powder, and carbon fiber are uniformly mixed in a ball mill at a mass ratio of 100: 5: 3, the rotation speed of the ball mill is 1200 rpm, and the processing time is 120 minutes. The obtained product is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 13 A lithium ion battery graphite negative electrode material of .8 μm is obtained.
実施例７
炭素含有量が９９.９％以上、粒子径が３〜４０μｍである人造黒鉛を、ＶＣ反応釜に入れ、人造黒鉛との質量比が６：１００であるタールピッチを導入して固相混合し、回転速度が８００ｒｐｍ、混合時間が１２０分間で、混合材料を得る。前記混合材料を窒素ガスの雰囲気下に配置し、９００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する人造黒鉛を得る。表面に不規則な炭素材料被覆層を有する人造黒鉛、導電性天然黒鉛粉末を１００：１５の質量比で融合機にて均一に混合させ、そのうち融合機の回転速度は１８００ｒｐｍであり、処理時間は１２０分間である。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が１５.３μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 7
Artificial graphite having a carbon content of 99.9% or more and a particle diameter of 3 to 40 μm is placed in a VC reaction kettle, and a tar pitch with a mass ratio of 6: 100 to the artificial graphite is introduced and solid phase mixed. The mixed material is obtained at a rotation speed of 800 rpm and a mixing time of 120 minutes. The mixed material is placed in an atmosphere of nitrogen gas, carbonized at 900 ° C., and then the reaction product is cooled to room temperature to obtain artificial graphite having an irregular carbon material coating layer on the surface. Artificial graphite having an irregular carbon material coating layer on its surface and conductive natural graphite powder are uniformly mixed in a fusion machine at a mass ratio of 100: 15, of which the rotation speed of the fusion machine is 1800 rpm, and the processing time is 120 minutes. The obtained product is sieved and demagnetized, the number of times of demagnetization is 3, the magnetic induction strength is 10000 Gs, the processing temperature is 10 ° C., the number of times of hammering the electromagnetic hammer is 20 times / second, and the average particle size is 15 A lithium ion battery graphite negative electrode material having a thickness of .3 μm is obtained.
実施例８
炭素含有量が９９.９％以上、粒子径が３〜４０μｍであるブロック状天然黒鉛を、混練機中に入れ、ブロック状天然黒鉛との質量比が１０：１００である石油ピッチを導入して固相混合した。回転速度は１８０ｒｐｍ、混合時間は６０分間、温度は８０℃で、混合材料を得る。前記混合材料を窒素ガスの雰囲気下に配置し、１３００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。表面に不規則な炭素材料被覆層を有する天然黒鉛、導電性人造黒鉛粉末、分散剤を１００：１２：５の質量比で高速ナノ分散にて均一に混合させ、そのうち高速ナノ分散の回転速度は２５００ｒｐｍ、処理時間は２４０分間であり、分散剤はポリスチレンスルホン酸アンモニウムである。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が１２.１μｍであるリチウムイオン電池黒鉛負極材料を得る。
Example 8
Block-shaped natural graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm is placed in a kneader, and a petroleum pitch having a mass ratio with the block-shaped natural graphite of 10: 100 is introduced. Solid phase mixed. The rotation speed is 180 rpm, the mixing time is 60 minutes, the temperature is 80 ° C., and a mixed material is obtained. The mixed material is placed in an atmosphere of nitrogen gas, carbonized at 1300 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. Natural graphite having an irregular carbon material coating layer on the surface, conductive artificial graphite powder, and a dispersant are uniformly mixed at a mass ratio of 100: 12: 5 by high-speed nanodispersion, and the rotation speed of the high-speed nanodispersion is 2500 rpm, the processing time is 240 minutes, and the dispersing agent is ammonium polystyrene sulfonate. The obtained material is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 12 A lithium ion battery graphite negative electrode material having a thickness of 0.1 μm is obtained.
比較実施例１
炭素含有量が９９.９％以上、粒子径が３〜４０μｍであるブロック状天然黒鉛を、ＶＣ反応釜中に入れ、天然黒鉛との質量比が８：１００である石油ピッチを導入して固相混合した。回転速度は１２００ｒｐｍ、混合時間は１２０分間で、混合材料を得る。前記混合材料を窒素ガスの雰囲気下に配置し、１２００℃で炭素化処理を行い、その後反応産物を常温まで冷却し、表面に不規則な炭素材料被覆層を有する天然黒鉛を得る。得られた物に対して篩分け、消磁を行い、消磁回数は３回、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、平均粒径が１２.５μｍであるリチウムイオン電池黒鉛負極材料を得る。
Comparative Example 1
Block-shaped natural graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm is placed in a VC reaction kettle and introduced into a petroleum pitch having a mass ratio of 8: 100 to natural graphite. Phase mixed. The rotating speed is 1200 rpm and the mixing time is 120 minutes, and the mixed material is obtained. The mixed material is placed in an atmosphere of nitrogen gas, carbonized at 1200 ° C., and then the reaction product is cooled to room temperature to obtain natural graphite having an irregular carbon material coating layer on the surface. The obtained material is sieved and demagnetized, the demagnetization frequency is 3 times, the magnetic induction strength is 10000 Gs, the treatment temperature is 10 ° C., the electromagnetic hammer hit frequency is 20 times / second, and the average particle size is 12 A lithium ion battery graphite negative electrode material having a thickness of 0.5 μm is obtained.
比較実施例２
炭素含有量が９９.９％以上、粒子径が３〜４０μｍである球状天然黒鉛とナノ導電剤ＳＰを１００：３の質量比でメカニカルボールミリングにて均一に混合し、そのうちボールミルの回転速度は１２００ｒｐｍ、処理時間は１２０分間である。得られた物に対して篩分け、消磁を行い、消磁回数は３回行い、磁気誘導強度は１００００Ｇｓ、処理温度は１０℃、電磁式ハンマー打撃回数は２０回／秒であり、そして平均粒径が１４.６μｍであるリチウムイオン電池黒鉛負極材料を得る。
Comparative Example 2
Spherical natural graphite having a carbon content of 99.9% or more and a particle size of 3 to 40 μm and nano-conductive agent SP are uniformly mixed at a mass ratio of 100: 3 by mechanical ball milling, of which the rotational speed of the ball mill is 1200 rpm, processing time is 120 minutes. The obtained material is sieved, demagnetized, the number of demagnetization is three times, the magnetic induction strength is 10,000 Gs, the treatment temperature is 10 ° C., the number of times of hammering the electromagnetic hammer is 20 times / second, and the average particle diameter A lithium ion battery graphite negative electrode material having a particle size of 14.6 μm is obtained.
図１から、導電剤が被覆黒鉛材料の表面に均一に分散しているということが分かる。本発明の機械的改質方法によれば、導電剤の使用効率と材料表面での安定性を大幅に向上させることができ、これによって負極活物質と電解液の相容性を向上させ、リチウムイオン電池の低温特性とレート特性を改善させることができる。 It can be seen from FIG. 1 that the conductive agent is uniformly dispersed on the surface of the coated graphite material. According to the mechanical reforming method of the present invention, the use efficiency of the conductive agent and the stability on the surface of the material can be greatly improved, thereby improving the compatibility between the negative electrode active material and the electrolyte, The low temperature characteristics and rate characteristics of the ion battery can be improved.
本発明の方法により製造された車載用及びエネルギー貯蔵用リチウムイオン電池負極材料は、導電剤の添加及び均一な分散により、図２から、機械的改質処理を採用した被覆黒鉛材料は、導電剤を添加しない比較例１と比べて、導電率が著しく優れ、６０〜１８０Ｓ／ｃｍ向上したことが分かる。 The lithium ion battery negative electrode material for in-vehicle use and energy storage manufactured by the method of the present invention is obtained by adding a conductive agent and uniformly dispersing, and from FIG. It can be seen that the conductivity is remarkably excellent and improved by 60 to 180 S / cm as compared with Comparative Example 1 in which no is added.
本発明の機械的改質方法によれば、図３から、導電剤の均一な分散が導電剤の使用効率と材料表面での安定性を大幅に向上させ、リチウムイオン電池の低温特性を改善し、全ての実施例の低温特性はいずれも比較例１と２より優れ、全ての実施例の２５℃低温回復率が９８.０％より高く、従来の技術に比べて８.０％以上向上させていることが分かる。 According to the mechanical reforming method of the present invention, it can be seen from FIG. 3 that the uniform dispersion of the conductive agent greatly improves the use efficiency of the conductive agent and the stability on the material surface, and improves the low temperature characteristics of the lithium ion battery. The low temperature characteristics of all examples are superior to those of Comparative Examples 1 and 2, and the low temperature recovery rate at 25 ° C. of all examples is higher than 98.0%, which is improved by 8.0% or more compared to the conventional technology. I understand that
本発明の方法により製造した車載用及びエネルギー貯蔵用リチウムイオン電池負極材料は、形態がＳ：４８００走査型電子顕微鏡により測定し、導電率がＭＣＰ−ＰＤ５１粉末導電率測定システムにより測定した。 The lithium ion battery negative electrode material for in-vehicle use and energy storage manufactured by the method of the present invention was measured by S: 4800 scanning electron microscope and the conductivity was measured by MCP-PD51 powder conductivity measurement system.
通常の評価用測定方法を用いて、実施例及び比較実施例の方法により製造された車載用及びエネルギー貯蔵用リチウムイオン電池負極材料の半電池特性を測定する。 Using normal measurement methods for evaluation, the half-cell characteristics of the in-vehicle and energy storage lithium-ion battery negative electrode materials produced by the methods of Examples and Comparative Examples are measured.
各実施例及び比較実施例の半電池結果は以下の表１により示す。 The half cell results for each example and comparative example are shown in Table 1 below.
本発明に使用する全電池試験方法は以下の通りである。実施例１〜８及び比較例１〜２を負極材料とし、ＣＭＣとＳＢＲをバインダーとし、Ｓｕｐｅｒ−Ｐを導電剤とし、負極材料とバインダーと導電剤を９５.８：３.２：１.０の質量比で混合して、銅箔の集電体に塗布し、乾燥、プレス、切取りを行ない負極極片を得る。さらにＬｉＣｏＯ2を正極材料とし、ＰＶＤＦをバインダーとし、Ｓｕｐｅｒ−Ｐを導電剤とし、正極材料とバインダーと導電剤を９４.５：１.５：４.０の質量比で混合して、アルミ箔の集電体に塗布し、通常の方法で乾燥、プレス、切取りを行ない正極極片を得る。前記マッチングする正負極極片に対して、（ＰＥ又はＰＰ）をセパレーターとし、正極／セパレーター／負極の順番で上から下に置き、その後レート特性が優れた円筒形１８６５０セルに巻き取れる。セルを鋼製ケーシングに組み込んで、密封してから乾燥のアルゴンガスグローブボックスにおいてセル注液口から適量の電解液（ｌｍｏｌ／Ｌ ＬｉＰＦ６／ＤＭＣ＋ＥＭＣ＋ＥＣ，１：１：１）を注入する。開口形成し、０.１Ｃで５０％Ｓ℃まで充電し、４〜６時間静置後、再び１Ｃで３サイクル充放電させ、２５℃の電池容量が得られ、再び室温で０.５Ｃ充電し、低温（−３０℃、−２０℃、−１０℃）で０.５Ｃ放電する。低温測定終了後、電池を室温に放置して一回充放電させ、低温回復率を計算する。具体的な結果は表２に示した通りである。 The whole battery test method used in the present invention is as follows. Examples 1 to 8 and Comparative Examples 1 to 2 were used as negative electrode materials, CMC and SBR were used as binders, Super-P was used as a conductive agent, and negative electrode materials, a binder, and a conductive agent were used as 95.8: 3.2: 1.0. Are mixed on a current collector of copper foil, dried, pressed and cut to obtain a negative electrode pole piece. Furthermore, LiCoO 2 is used as a positive electrode material, PVDF is used as a binder, Super-P is used as a conductive agent, and the positive electrode material, the binder, and the conductive agent are mixed at a mass ratio of 94.5: 1.5: 4.0 to obtain an aluminum foil. The positive electrode piece is obtained by applying, drying, pressing and cutting by a conventional method. With respect to the matching positive and negative electrode pieces, (PE or PP) is used as a separator, placed in the order of positive electrode / separator / negative electrode, and then wound on a cylindrical 18650 cell having excellent rate characteristics. The cell is assembled in a steel casing and sealed, and then an appropriate amount of electrolyte (lmol / L LiPF6 / DMC + EMC + EC, 1: 1: 1) is injected from the cell inlet in a dry argon gas glove box. Opened, charged at 0.1C to 50% S ° C, allowed to stand for 4-6 hours, then charged and discharged again at 1C for 3 cycles to obtain a battery capacity of 25 ° C, and charged again at room temperature for 0.5C. Discharge 0.5C at low temperature (-30 ° C, -20 ° C, -10 ° C). After completion of the low temperature measurement, the battery is left at room temperature to charge and discharge once, and the low temperature recovery rate is calculated. Specific results are as shown in Table 2.
以下の方法で低温回復率を計算する。
低温回復率＝低温測定前２５℃電池容量／低温測定後２５℃電池回復容量×１００％
The low temperature recovery rate is calculated by the following method.
Low temperature recovery rate = 25 ° C. battery capacity before low temperature measurement / 25 ° C. battery recovery capacity after low temperature measurement × 100%
本発明は、上記実施形態に限定されるものではない。上記実施形態は、例示であり、本発明の特許請求の範囲に記載された技術的思想と実質的に同一な構成を有し、同様な作用効果を奏するものは、いかなるものであっても本発明の技術的範囲に包含される。 The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.
Claims (10)
混合材料に対して５００〜１８００℃で炭素化処理を行い、表面に不規則な炭素材料被覆層を有する黒鉛材料を得る工程（２）、
工程（２）で得られた材料と導電性材料に対してメカニカルミル法での改質処理を行う工程（３）、及び
篩分け、消磁してリチウムイオン電池負極材料を得る工程（４）を含む車載用及びエネルギー貯蔵用リチウムイオン電池負極材料の製造方法。 A method for producing a lithium ion battery negative electrode material for in-vehicle use and energy storage, wherein a graphite-based material is coated with an organic carbon source to obtain a mixed material (1),
(2) a step of carbonizing the mixed material at 500 to 1800 ° C. to obtain a graphite material having an irregular carbon material coating layer on the surface;
A step (3) of performing a modification process by a mechanical mill method on the material and the conductive material obtained in the step (2), and a step (4) of obtaining a lithium ion battery negative electrode material by sieving and demagnetizing. The manufacturing method of the lithium ion battery negative electrode material for vehicle-mounted and energy storage containing.
好ましくは、前記導電性材料はナノ導電剤及び／又は導電性黒鉛であり、好ましくは、前記ナノ導電剤はＣＮＴｓ、炭素繊維、ナノ黒鉛又はグラフェンのうちの１種又は少なくとも２種の組合せであり、好ましくは、前記ナノ導電剤の平均寸法は１０〜６００.０ｎｍであり、比表面積ＳＳＡは２.０〜６０.０ｍ2／ｇであり、好ましくは、前記ナノ導電剤の平均寸法は１０.０〜３００.０ｎｍであり、好ましくは、前記ＣＮＴと炭素繊維の直径は１〜３００ｎｍであり、長さは１〜２０μｍであり、好ましくは、前記グラフェンの黒鉛層の数は１〜１００であり、好ましくは、前記ナノ導電剤はナノ導電性液体の形で存在し、好ましくは、前記ナノ導電性液体におけるナノ導電剤の含有量は０.５〜２０ｗｔ％であり、好ましくは、前記ナノ導電性液体における分散溶媒は水、メタノール、エタノール、アセトン又はクロロホルムのうちの１種又は少なくとも２種の組合せであることを特徴とする請求項１又は２に記載の方法。 The organic carbon source is one or a combination of at least two of tar pitch, petroleum pitch, meso pitch, polymer material or polymer,
Preferably, the conductive material is a nano conductive agent and / or conductive graphite, and preferably the nano conductive agent is one or a combination of at least two of CNTs, carbon fiber, nanographite, or graphene. Preferably, the nano conductive agent has an average size of 10 to 60.0 nm and a specific surface area SSA of 2.0 to 60.0 m 2 / g. Preferably, the nano conductive agent has an average size of 10. The diameter of the CNT and the carbon fiber is 1 to 300 nm, the length is 1 to 20 μm, and preferably the number of the graphite layers of the graphene is 1 to 100 Preferably, the nano-conductive agent is present in the form of a nano-conductive liquid, and preferably the content of the nano-conductive agent in the nano-conductive liquid is 0.5 to 20 wt%. The method according to claim 1 or 2 dispersed solvent in sexual liquid is characterized water, methanol, ethanol, that is one or at least two combinations of acetone or chloroform.
工程（２）に記載の炭素化処理温度は６００〜１６００℃であり、特に好ましくは７００〜１５００℃であることを特徴とする請求項１〜４のいずれか１項に記載の方法。 The coating described in step (1) is a solid phase coating or a liquid phase coating,
The method according to any one of claims 1 to 4, wherein the carbonization temperature in the step (2) is 600 to 1600 ° C, particularly preferably 700 to 1500 ° C.
好ましくは、工程（４）に記載の消磁の磁気誘導強度は３０００〜３００００Ｇｓであり、処理温度は１０〜８０℃であり、消磁時間は１０〜１２０ｓであることを特徴とする請求項１〜５のいずれか１項に記載の方法。 The modification treatment by the mechanical mill method described in the step (3) is a ball milling treatment, a fusion treatment or a high-speed nano-dispersion treatment, and preferably the ball milling modification treatment time is 5.0 minutes or more. The speed is 200 to 4000 r / min, preferably the ball milling reforming treatment time is 5.0 to 120.0 minutes, and preferably the diameter of the ball employed in the ball milling reforming treatment is 0.00. 1 to 3.0 mm, the type of the ball is alumina ball, zirconium oxide or corundum ball, preferably the fusion treatment time is 20.0 to 80.0 minutes and the rotation speed is 800 to 3000 r / min. The cavity gap is 0.1 to 2.0 cm, the temperature is 10 to 80 ° C., and preferably, the fusion treatment time is 20.0 to 30.0 minutes. Yes, preferably, the fusion process rotation speed is 800-2600 r / min, preferably the fusion process cavity gap is 0.1-1.0 cm, preferably, the fusion process temperature is 20-60. The high-speed nano-dispersion time is 20.0 to 120.0 minutes, the rotation speed is 200 to 8000 r / min, and preferably the high-speed nano-dispersion employs a dispersant, The mass ratio of the conductive material to the dispersant is (1: 0.1) to (1: 1), particularly preferably (1: 0.3) to (1: 0.8), Preferably, the dispersant is sodium carboxymethyl cellulose, sodium lignin sulfonate, magnesium lignin sulfonate, sodium polystyrene sulfonate, ammonium polystyrene sulfonate, Is one or at least two combinations of the switch range naphthyl sodium sulfonate or polyacrylamide,
Preferably, the magnetic induction strength of demagnetization described in the step (4) is 3000 to 30000 Gs, the processing temperature is 10 to 80 ° C., and the demagnetization time is 10 to 120 s. The method of any one of these.
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における不規則な炭素材料被覆層の含有量は０.１〜２０.０ｗｔ％であり、更に好ましくは０.５〜１８.０ｗｔ％であり、特に好ましくは１〜１５.０ｗｔ％であり、
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における不規則な炭素材料被覆層と黒鉛系材料の質量比は（０.１：１００）〜（２０.０：１００）であり、更に好ましくは（０.５：１００）〜（１８.０：１００）であり、特に好ましくは（０.５：１００）〜（１５.０：１００）であり、
好ましくは、前記車載用及びエネルギー貯蔵用リチウムイオン電池負極材料における黒鉛系材料と導電性材料の質量比は（１０：０.０１）〜（１０：１０.０）であり、更に好ましくは（１０：０.１）〜（１０：８.０）であり、特に好ましくは（１０：０.５）〜（１０：６.０）であることを特徴とする請求項７又は８に記載の車載用及びエネルギー貯蔵用リチウムイオン電池負極材料。 The content of the conductive material in the lithium ion battery negative electrode material for in-vehicle use and energy storage is 0.1 to 20.0 wt%, more preferably 0.5 to 18.0 wt%, and particularly preferably 1 to 1 wt%. 15.0 wt%,
Preferably, the content of the irregular carbon material coating layer in the in-vehicle and energy storage lithium ion battery negative electrode material is 0.1 to 20.0 wt%, more preferably 0.5 to 18.0 wt%. Yes, particularly preferably 1 to 15.0 wt%,
Preferably, the mass ratio of the irregular carbon material coating layer to the graphite-based material in the in-vehicle and energy storage lithium ion battery negative electrode material is (0.1: 100) to (20.0: 100), Preferably (0.5: 100) to (18.0: 100), particularly preferably (0.5: 100) to (15.0: 100),
Preferably, the mass ratio of the graphite-based material to the conductive material in the in-vehicle and energy storage lithium ion battery negative electrode materials is (10: 0.01) to (10: 10.0), and more preferably (10 : 0.1) to (10: 8.0), and particularly preferably (10: 0.5) to (10: 6.0). Lithium ion battery negative electrode materials for energy use and energy storage.
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| CN113265008B (en) * | 2021-07-02 | 2022-03-01 | 重庆力宏精细化工有限公司 | High-viscosity lithium carboxymethyl cellulose and preparation method and application thereof |
| CN115117366B (en) * | 2022-08-29 | 2022-11-18 | 天津凯普瑞特新能源科技有限公司 | Carbon-coated aluminum foil, manufacturing process thereof and lithium ion battery |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004196609A (en) * | 2002-12-19 | 2004-07-15 | Jfe Chemical Corp | Production method for composite graphite particle, composite graphite particle, cathode material for lithium ion secondary battery, and lithium ion secondary battery |
| JP2005097010A (en) * | 2003-09-22 | 2005-04-14 | Showa Denko Kk | Carbon material, production method therefor and its application |
| JP2005294011A (en) * | 2004-03-31 | 2005-10-20 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2006077214A (en) * | 2004-09-13 | 2006-03-23 | Lignyte Co Ltd | Carbon-phenol resin composite material, carbon-phenol resin cured composite material, carbon-phenol resin carbonized composite material, fuel cell separator, conductive resin composition, cell electrode and electric double layer capacitor |
| JP2008186732A (en) * | 2007-01-30 | 2008-08-14 | Nippon Carbon Co Ltd | Negative electrode active material for lithium secondary battery, negative electrode using the same, and manufacturing method |
| JP2009158105A (en) * | 2007-12-25 | 2009-07-16 | Tokai Carbon Co Ltd | Method of manufacturing composite carbon material for negative electrode material of lithium ion secondary battery |
| JP2010218758A (en) * | 2009-03-13 | 2010-09-30 | Tokai Carbon Co Ltd | Negative electrode material for lithium secondary battery and method for manufacturing the same |
| CN101887967A (en) * | 2010-06-18 | 2010-11-17 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium ion battery cathode material and preparation method thereof |
| JP2012519124A (en) * | 2009-03-02 | 2012-08-23 | 昭和電工株式会社 | Composite graphite particles and lithium secondary battery using the same |
| WO2012140790A1 (en) * | 2011-04-13 | 2012-10-18 | エス・イー・アイ株式会社 | Electrode material for lithium secondary battery and lithium secondary battery |
| WO2013002162A1 (en) * | 2011-06-30 | 2013-01-03 | 三洋電機株式会社 | Nonaqueous electrolyte secondary cell and method for manufacturing same |
| JP2013506233A (en) * | 2010-07-02 | 2013-02-21 | シェンヅェン ビーティーアール ニュー エナジー マテリアルズ インコーポレイテッド | Method for producing lithium ion battery negative electrode material |
| JP2013201104A (en) * | 2011-03-29 | 2013-10-03 | Mitsubishi Chemicals Corp | Negative electrode carbon material for nonaqueous secondary battery, negative electrode, and nonaqueous secondary battery |
| JP2013222641A (en) * | 2012-04-18 | 2013-10-28 | Showa Denko Kk | Negative electrode material for lithium ion battery and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1624955A (en) * | 2003-12-01 | 2005-06-08 | 上海杉杉科技有限公司 | Method for manufacturing carbon nagtive electrode material of lithium ion cell |
| KR101154291B1 (en) * | 2005-03-23 | 2012-06-13 | 니폰 제온 가부시키가이샤 | Binder for electrode of nonaqueous electrolyte secondary battery, electrode, and nonaqueous electrolyte secondary battery |
| CN100350654C (en) * | 2005-04-20 | 2007-11-21 | 深圳市贝特瑞电子材料有限公司 | Cathode material of Li-ion battery and preparation method, battery cathode, battery thereof |
| CN101412510A (en) * | 2007-10-15 | 2009-04-22 | 台湾松下能源股份有限公司 | Composite graphite for lithium secondary battery and manufacturing method thereof |
| EP2450985B1 (en) * | 2009-07-01 | 2017-09-27 | Zeon Corporation | Electrode for secondary battery, slurry for secondary battery electrode, and secondary battery |
-
2013
- 2013-11-08 CN CN201310554920.3A patent/CN103560247B/en active Active
-
2014
- 2014-06-12 KR KR1020140071407A patent/KR20150053693A/en active Search and Examination
- 2014-07-31 JP JP2014156362A patent/JP6152076B2/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004196609A (en) * | 2002-12-19 | 2004-07-15 | Jfe Chemical Corp | Production method for composite graphite particle, composite graphite particle, cathode material for lithium ion secondary battery, and lithium ion secondary battery |
| JP2005097010A (en) * | 2003-09-22 | 2005-04-14 | Showa Denko Kk | Carbon material, production method therefor and its application |
| JP2005294011A (en) * | 2004-03-31 | 2005-10-20 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JP2006077214A (en) * | 2004-09-13 | 2006-03-23 | Lignyte Co Ltd | Carbon-phenol resin composite material, carbon-phenol resin cured composite material, carbon-phenol resin carbonized composite material, fuel cell separator, conductive resin composition, cell electrode and electric double layer capacitor |
| JP2008186732A (en) * | 2007-01-30 | 2008-08-14 | Nippon Carbon Co Ltd | Negative electrode active material for lithium secondary battery, negative electrode using the same, and manufacturing method |
| JP2009158105A (en) * | 2007-12-25 | 2009-07-16 | Tokai Carbon Co Ltd | Method of manufacturing composite carbon material for negative electrode material of lithium ion secondary battery |
| JP2012519124A (en) * | 2009-03-02 | 2012-08-23 | 昭和電工株式会社 | Composite graphite particles and lithium secondary battery using the same |
| JP2010218758A (en) * | 2009-03-13 | 2010-09-30 | Tokai Carbon Co Ltd | Negative electrode material for lithium secondary battery and method for manufacturing the same |
| CN101887967A (en) * | 2010-06-18 | 2010-11-17 | 深圳市贝特瑞新能源材料股份有限公司 | Lithium ion battery cathode material and preparation method thereof |
| JP2013506233A (en) * | 2010-07-02 | 2013-02-21 | シェンヅェン ビーティーアール ニュー エナジー マテリアルズ インコーポレイテッド | Method for producing lithium ion battery negative electrode material |
| JP2013201104A (en) * | 2011-03-29 | 2013-10-03 | Mitsubishi Chemicals Corp | Negative electrode carbon material for nonaqueous secondary battery, negative electrode, and nonaqueous secondary battery |
| WO2012140790A1 (en) * | 2011-04-13 | 2012-10-18 | エス・イー・アイ株式会社 | Electrode material for lithium secondary battery and lithium secondary battery |
| WO2013002162A1 (en) * | 2011-06-30 | 2013-01-03 | 三洋電機株式会社 | Nonaqueous electrolyte secondary cell and method for manufacturing same |
| JP2013222641A (en) * | 2012-04-18 | 2013-10-28 | Showa Denko Kk | Negative electrode material for lithium ion battery and application thereof |
Cited By (18)
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| KR20150053693A (en) | 2015-05-18 |
| CN103560247A (en) | 2014-02-05 |
| CN103560247B (en) | 2017-02-01 |
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