CN103545492A - Preparation method of multiple composite anode material of lithium ion battery - Google Patents
Preparation method of multiple composite anode material of lithium ion battery Download PDFInfo
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- CN103545492A CN103545492A CN201310511216.XA CN201310511216A CN103545492A CN 103545492 A CN103545492 A CN 103545492A CN 201310511216 A CN201310511216 A CN 201310511216A CN 103545492 A CN103545492 A CN 103545492A
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 20
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000010405 anode material Substances 0.000 title abstract description 5
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims abstract description 30
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000010703 silicon Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000000498 ball milling Methods 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000003763 carbonization Methods 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims abstract description 7
- 229930006000 Sucrose Natural products 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 7
- 238000011282 treatment Methods 0.000 claims abstract description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 6
- 239000011259 mixed solution Substances 0.000 claims abstract description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 5
- 239000012153 distilled water Substances 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 31
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 22
- 239000007789 gas Substances 0.000 claims description 14
- 229910052786 argon Inorganic materials 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000005255 carburizing Methods 0.000 claims description 10
- 239000001257 hydrogen Substances 0.000 claims description 10
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 230000003179 granulation Effects 0.000 claims description 8
- 238000005469 granulation Methods 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 7
- 239000005720 sucrose Substances 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 3
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 3
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 238000001507 sample dispersion Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 238000001816 cooling Methods 0.000 claims 2
- 238000010792 warming Methods 0.000 claims 2
- 150000002431 hydrogen Chemical class 0.000 claims 1
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 239000010406 cathode material Substances 0.000 abstract 2
- 239000002210 silicon-based material Substances 0.000 abstract 1
- 229960004793 sucrose Drugs 0.000 abstract 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052723 transition metal Inorganic materials 0.000 description 3
- 150000003624 transition metals Chemical class 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000002153 silicon-carbon composite material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(II,III) oxide Inorganic materials [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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Classifications
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- 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
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- 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
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/386—Silicon or alloys based on silicon
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/483—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides for non-aqueous cells
-
- 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
The invention discloses a preparation method of a multiple composite anode material of a lithium ion battery. The preparation method comprises the following steps of: (1) treating silicon, silicon monoxide and cane sugar by methods such as ball milling and carbonization to obtain a primary sample with a silicon/silicon monoxide/carbon multiple composite structure; (2) dispersing the primary sample obtained in the step (1) in the mixed solution of ethyl orthosilicate and ethanol and adding excessive distilled water so that the ethyl orthosilicate is completely hydrolyzed into silicon dioxide, and drying; performing treatments such as ball milling and carbonization on the sample obtained after drying and polyvinyl chloride to obtain the silicon/silicon monoxide/carbon/silicon dioxide/carbon multiple composite anode material. The composite cathode material prepared by the method provided by the invention is spherically granular, even in particle size distribution and high in electronic conductivity; and the cathode material with such a composite structure is capable of improving the electrochemical properties of a silicon-based material.
Description
Technical field
The present invention relates to a kind of preparation method of MULTIPLE COMPOSITE negative material of lithium ion battery.
Background technology
Lithium ion battery is the novel rechargeable battery of a kind of high-energy-density, long service life, cleanliness without any pollution, in fields such as various portable electric appts, electric automobile, large-scale energy storage base stations, has a wide range of applications.In the structure of lithium ion battery, positive and negative pole material is the key substance that determines the factors such as lithium ion battery energy storage, useful life, price.Yet, since lithium ion battery commercialization, positive electrode is constantly being weeded out the old and bring forth the new, and negative material adopts graphite type material always, the further raising that this has hindered lithium ion battery energy density, makes current lithium ion battery can not fully meet user's demand.
In the lithium ion battery negative material of research and development, transition metal negative material is the focus of research and development at present.Although transition metal negative material has the advantages that Theoretical Mass capacity is high, but the storage lithium process of this class material relates to a kind of conversion reaction mechanism of structural deterioration, make its actual mass specific capacity lower, as Co3O4 circulation 100 weeks reversible specific discharge capacity afterwards only has 200-400mAh/g, thereby transition metal negative material can not the demand of fine satisfied society to high power capacity negative material.By contrast, silica-base material is a kind of negative material of Theoretical Mass specific capacity superelevation, and it adopts alloying reaction process to carry out stored energy, and its Theoretical Mass specific capacity can reach 4200mAh/g.Meanwhile, just because of these two kinds of advantages, make silica-base material have chemistry and the electrochemical stability of potential higher reversible capacity, excellence, therefore, silicon based anode material is a kind of lithium ion battery negative material that has very much DEVELOPMENT PROSPECT.
The preparation method of existing silicon based anode material, mainly to utilize carbon source (as sucrose, pitch etc.) and silicon under ball milling, to carry out compound, recycling carburizing sintering obtains Si-C composite material, yet, this class synthesis technique has caused the Si-C composite material that obtains to be unfavorable for cushioning the volumetric expansion of silicon in high embedding lithium situation due to simple in structure, loose when pursuing work simplification, make its cyclical stability of resulting material poor, therefore, this class material is not suitable for commercial applications.
Summary of the invention
The present invention is in order to overcome above-mentioned deficiency, provides that a kind of technological controllability is good, reappearance is high, the preparation method of the MULTIPLE COMPOSITE negative material of the lithium ion battery that energy consumption is low.
Technical scheme of the present invention is as follows:
The preparation method of MULTIPLE COMPOSITE negative material, it is characterized in that, comprise the following steps:
(1) silicon, silicon monoxide and sucrose are carried out to ball milling mixing granulation for 3: 1: 2 in molar ratio, after mixing granulation, carry out carbonization treatment for the first time, in the hydrogen that is 1: 20 in volume ratio and the mist of argon gas, with the speed of 2 ℃ per minute, be warmed up to 800 ℃, 800 ℃ of carburizing sinterings 5 hours, naturally cool to room temperature, form carbon coating layer, take out sample ball milling 10 minutes, obtain the preliminary sample of silicon/silicon monoxide/carbon MULTIPLE COMPOSITE structure;
(2) in the tetraethoxysilane that is 1: 4 by the sample dispersion obtaining in step (1) to volume ratio and the mixed solution of ethanol, after being uniformly mixed 1 hour, drip excessive distilled water and be all hydrolyzed to silicon dioxide to tetraethoxysilane, the sample of gained is dried at 120 ℃;
The sample of gained after drying is carried out to ball milling with polyvinyl chloride with mass ratio at 3: 1 to be mixed, after mixing, be coated granulation, in the hydrogen that is 1: 20 in volume ratio and the mist of argon gas, with the speed of 2 ℃ per minute, be warmed up to 600 ℃, 600 ℃ of carburizing sinterings 5 hours;
Carry out again carbonization treatment for the second time, in the mist of the hydrogen that is 1: 2: 20 in volume ratio, acetylene and argon gas, with the speed of 1 ℃ per minute, be warmed up to 900 ℃, 900 ℃ of carburizing sinterings 2 hours, naturally cool to room temperature, form carbon coating layer, take out sample ball milling 10 minutes, fragmentation break up to particle diameter be 0.5～2 μ m, obtain silicon/silicon monoxide/carbon/silicon/carbon dioxide MULTIPLE COMPOSITE negative material.
The invention has the beneficial effects as follows:
(1) the method technological controllability is good, reappearance is high, the particle of silicon/silicon monoxide/carbon/silicon/carbon dioxide MULTIPLE COMPOSITE negative material that application this method is synthetic is spherical in shape, particle diameter is in 0.5-2 micron left and right, the good dispersion of particle, there is higher reversible capacity and good cycle life, can meet the needs of high-capacity lithium ion cell practical application;
(2) the present invention takes full advantage of and enriches sucrose and polyvinyl chloride resource is developed lithium ion battery negative material, has reduced the actual cost of lithium ion battery from the source of manufactured materials, is particularly suitable for large-scale industrialization and produces.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the charging and discharging curve figure of silicon/silicon monoxide/carbon/silicon/carbon dioxide MULTIPLE COMPOSITE negative material of gained in the embodiment of the present invention 1.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention is only described in a schematic way, so it only show the formation relevant with the present invention.
Embodiment 1:
Get 0.3mol silica flour, 0.1mol silicon monoxide and 0.1mol sucrose and carry out ball milling mixing; then under the hydrogen that is 1: 20 in volume ratio and argon gas mixed gas protected; with the speed of 2 ℃ per minute, be warmed up to 800 ℃; 800 ℃ of carburizing sinterings 5 hours; naturally cool to room temperature; take out sample ball milling 10 minutes, obtain the preliminary sample of silicon/silicon monoxide/carbon MULTIPLE COMPOSITE structure.Sample 10g obtained above is distributed in the mixed solution of 100ml tetraethoxysilane and ethanol, wherein the volume ratio of tetraethoxysilane and ethanol is 1: 4, after being uniformly mixed 1 hour, drip excessive distilled water and make tetraethoxysilane all be hydrolyzed to silicon dioxide, after the sample of gained is dried at 120 ℃.Then, the sample of gained and polyvinyl chloride are carried out to ball milling mixing with mass ratio at 3: 1, then under the hydrogen that is 1: 20 in volume ratio and argon gas mixed gas protected, with the speed of 2 ℃ per minute, be warmed up to 600 ℃, 600 ℃ of carburizing sinterings 5 hours, then, the hydrogen that is 1: 2: 20 in volume ratio, under acetylene and argon gas mixed gas protected, with the speed of 1 ℃ per minute, be warmed up to 900 ℃, 900 ℃ of carburizing sinterings 2 hours, naturally cool to room temperature, take out sample ball milling 10 minutes, fragmentation break up to particle diameter be 0.5～2 μ m, obtain final silicon/silicon monoxide/carbon/silicon/carbon dioxide MULTIPLE COMPOSITE negative material.As shown in Figure 1, using the product of gained as Electrode, metal lithium sheet is as to electrode, in being full of the glove box of argon gas, be assembled into experiment fastening lithium ionic cell, multiplying power with 0.1C is carried out charge and discharge cycles in 0.01-3.0V potential region, and can obtain initial charge capacity is 1763.5mAh/g, and discharge capacity is 1407.6mAh/g, its reversible capacity circulating after 100 weeks is 935.7mAh/g, has shown excellent chemical property.
Above-mentioned is enlightenment according to the present invention, and by above-mentioned description, relevant staff can, within not departing from the scope of this invention technological thought, carry out various change and modification completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to claim scope.
Claims (4)
1. a preparation method for the MULTIPLE COMPOSITE negative material of lithium ion battery, is characterized in that, comprises the following steps:
(1) silicon, silicon monoxide and sucrose are carried out to ball milling mixing granulation, after mixing granulation, carry out carbonization treatment for the first time, with the speed of 2 ℃ per minute, be warmed up to 800 ℃, 800 ℃ of carburizing sinterings 5 hours, naturally cool to room temperature, form carbon coating layer, take out sample ball milling 10 minutes, obtain the preliminary sample of silicon/silicon monoxide/carbon MULTIPLE COMPOSITE structure;
(2) by the sample dispersion obtaining in step (1) in the mixed solution of tetraethoxysilane and ethanol, drip distilled water until tetraethoxysilane is all hydrolyzed to silicon dioxide after being uniformly mixed 1 hour, the sample of gained is dried at 120 ℃;
The sample of gained after drying is carried out to ball milling with polyvinyl chloride and mix, mix and be coated granulation afterwards, with the speed of 2 ℃ per minute, be warmed up to 600 ℃, 600 ℃ of carburizing sinterings 5 hours;
Carry out again carbonization treatment for the second time, with the speed of 1 ℃ per minute, be warmed up to 900 ℃, 900 ℃ of carburizing sinterings 2 hours, naturally cool to room temperature, form carbon coating layer, take out sample ball milling 10 minutes, fragmentation break up to particle diameter be 0.5～2 μ m, obtain silicon/silicon monoxide/carbon/silicon/carbon dioxide MULTIPLE COMPOSITE negative material.
2. the preparation method of the MULTIPLE COMPOSITE negative material of lithium ion battery according to claim 1, is characterized in that, in described step (1), silicon, silicon monoxide and sucrose carry out ball milling mixing granulation for 3: 1: 2 in molar ratio; From start to be warming up to the process that cooling finishes, passing into volume ratio during carbonization treatment is for the first time the hydrogen of 1: 20 and the mist of argon gas.
3. the preparation method of the MULTIPLE COMPOSITE negative material of lithium ion battery according to claim 2, is characterized in that, replaces the mist of hydrogen and argon gas with nitrogen.
4. the preparation method of the MULTIPLE COMPOSITE negative material of lithium ion battery according to claim 1, is characterized in that, in described step (2), in the mixed solution of tetraethoxysilane and ethanol, tetraethoxysilane mixes with volume ratio with ethanol at 1: 4; Material after oven dry be take mass ratio and as 3: 1, is carried out ball milling and mix with polyvinyl chloride, in the coated granulation process after mixing, passing into volume ratio is the hydrogen of 1: 20 and the mist of argon gas; From start to be warming up to the process that cooling finishes, pass into the mist that volume ratio is hydrogen, acetylene and the argon gas of 1: 2: 20 during carbonization treatment for the second time.
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| CN104332632A (en) * | 2014-08-22 | 2015-02-04 | 新乡远东电子科技有限公司 | Lithium ion battery silicon-carbon negative electrode material and preparation method thereof |
| JPWO2015140983A1 (en) * | 2014-03-20 | 2017-04-06 | 株式会社東芝 | Non-aqueous electrolyte battery active material, non-aqueous electrolyte battery electrode, non-aqueous electrolyte secondary battery, battery pack, and method for producing non-aqueous electrolyte battery active material |
| CN107623116A (en) * | 2017-09-22 | 2018-01-23 | 苏州海旭新材料科技有限公司 | A kind of composite cathode material of lithium ion battery and preparation method thereof |
| CN109560278A (en) * | 2018-11-30 | 2019-04-02 | 北京科技大学 | A kind of lithium ion battery negative material aoxidizes the preparation method of sub- silico-carbo/graphite |
| CN113506864A (en) * | 2021-04-12 | 2021-10-15 | 南京睿扬光电技术有限公司 | Silicon monoxide composite material for lithium ion battery and preparation method thereof |
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| CN107623116A (en) * | 2017-09-22 | 2018-01-23 | 苏州海旭新材料科技有限公司 | A kind of composite cathode material of lithium ion battery and preparation method thereof |
| CN107623116B (en) * | 2017-09-22 | 2020-07-17 | 苏州锦艺新材料科技有限公司 | Lithium ion battery cathode composite material and preparation method thereof |
| CN109560278A (en) * | 2018-11-30 | 2019-04-02 | 北京科技大学 | A kind of lithium ion battery negative material aoxidizes the preparation method of sub- silico-carbo/graphite |
| CN113506864A (en) * | 2021-04-12 | 2021-10-15 | 南京睿扬光电技术有限公司 | Silicon monoxide composite material for lithium ion battery and preparation method thereof |
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