CN109585804A - 一种FeSx/C/CNT复合负极材料的制备方法及应用 - Google Patents
一种FeSx/C/CNT复合负极材料的制备方法及应用 Download PDFInfo
- Publication number
- CN109585804A CN109585804A CN201811242146.1A CN201811242146A CN109585804A CN 109585804 A CN109585804 A CN 109585804A CN 201811242146 A CN201811242146 A CN 201811242146A CN 109585804 A CN109585804 A CN 109585804A
- Authority
- CN
- China
- Prior art keywords
- fes
- cnt composite
- negative pole
- source
- pole material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 74
- 239000000463 material Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229910005432 FeSx Inorganic materials 0.000 claims abstract description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052742 iron Inorganic materials 0.000 claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 18
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 15
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000005864 Sulphur Substances 0.000 claims abstract description 11
- 238000001694 spray drying Methods 0.000 claims abstract description 9
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 8
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 8
- 239000002243 precursor Substances 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000008367 deionised water Substances 0.000 claims abstract description 4
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 4
- 239000011261 inert gas Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 7
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 7
- 239000011790 ferrous sulphate Substances 0.000 claims description 7
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical group [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 7
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 7
- -1 Kynoar Chemical compound 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 5
- 229920002472 Starch Polymers 0.000 claims description 4
- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 claims description 4
- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 3
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [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
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 3
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 3
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 3
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 2
- 229930006000 Sucrose Natural products 0.000 claims description 2
- 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 description 2
- 239000008103 glucose Substances 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000011295 pitch Substances 0.000 claims description 2
- 229920000128 polypyrrole Polymers 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 2
- 239000005720 sucrose Substances 0.000 claims description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims 1
- 239000004372 Polyvinyl alcohol Substances 0.000 claims 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 claims 1
- RCHKEJKUUXXBSM-UHFFFAOYSA-N n-benzyl-2-(3-formylindol-1-yl)acetamide Chemical compound C12=CC=CC=C2C(C=O)=CN1CC(=O)NCC1=CC=CC=C1 RCHKEJKUUXXBSM-UHFFFAOYSA-N 0.000 claims 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000004090 dissolution Methods 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 1
- 239000007773 negative electrode material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 125000004122 cyclic group Chemical group 0.000 description 6
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 229920002239 polyacrylonitrile Polymers 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920001568 phenolic resin Polymers 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- 239000002904 solvent Substances 0.000 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 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 229910052976 metal sulfide Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 150000002085 enols Chemical class 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- JVHAXZCOIRYFSJ-BTVCFUMJSA-N iron;(2r,3s,4r,5r)-2,3,4,5,6-pentahydroxyhexanal Chemical compound [Fe].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O JVHAXZCOIRYFSJ-BTVCFUMJSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- H01M4/362—Composites
-
- 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
-
- 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
- H01M4/581—Chalcogenides or intercalation compounds thereof
- H01M4/5815—Sulfides
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
本发明公开了一种FeSx/C/CNT复合负极材料的制备方法及应用,属于材料合成及化学电源领域。本发明将铁源溶解到去离子水中,然后加入碳源和碳纳米管并混合均匀,再加入硫源,溶解后喷雾干燥得到FeSx/C/CNT复合材料前驱体;将FeSx/C/CNT复合材料前驱体置于温度为500~600℃、惰性气体氛围条件下煅烧5~8h,随炉冷却,采用去离子水洗涤,然后真空干燥即得FeSx/C/CNT复合负极材料。本发明的FeSx/C/CNT复合负极材料可以用于锂电池负极,具有高的比容量和优异的循环稳定性,室温下,在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量为630 mAh/g,库伦效率可达99%。
Description
技术领域
本发明涉及一种FeSx/C/CNT复合负极材料的制备方法及应用,属于材料合成及化学电源领域。
背景技术
锂离子电池是一种高能量密度、高效率的电能存储装置,已被广泛应用于小型可移动电子设备。与其他电池体系一样,锂离子电池主要由负极材料、正极材料、隔膜和电解液四大关键材料构成,材料的性质与锂离子电池的性能有着非常重要的关系。
锂离子电池负极材料为能可逆地嵌入-脱嵌锂离子的化合物,如层状石墨,过渡金属硫化物等。
FeSx作为过渡金属硫化物的锂离子电池负极,因充放电过程中涉及多电子电化学反应,理论质量比容量和理论质量比能量高,但是FeSx在充放电循环过程中存在体积膨胀、多硫中间体溶解等问题,导致其活性材料利用率和循环性能变差。
发明内容
针对现有技术中FeSx作为过渡金属硫化物的锂离子电池负极存在的问题,本发明提供一种FeSx/C/CNT复合负极材料的制备方法及应用,本发明的FeSx/C/CNT复合负极材料具有良好的导电网络和很好的固硫能力,提高活性物质的利用率,赋予该负极高的比容量和优异的循环性能。
一种FeSx/C/CNT复合负极材料的制备方法,具体步骤如下:
(1)将铁源溶解到去离子水中,然后加入碳源和碳纳米管并混合均匀,再加入硫源,溶解后喷雾干燥得到FeSx/C/CNT复合材料前驱体;
(2)将步骤(1)FeSx/C/CNT复合材料前驱体置于温度为500~600℃、惰性气体氛围条件下煅烧5~8 h,随炉冷却,采用去离子水洗涤,然后真空干燥即得FeSx/C/CNT复合负极材料。
所述步骤(1)中铁源为硫酸亚铁、硫酸铁、绿化亚铁、硝酸亚铁或硝酸铁,碳源为葡萄糖、蔗糖、可溶性淀粉、PAN(聚丙烯腈)、PVP(聚乙烯吡咯烷酮)、PEG(聚乙二醇)、PVA(聚乙烯醇)、PVDF(聚偏氟乙烯)、CMC(羧甲基纤维素钠)、聚吡咯、酚醛树脂或沥青,硫源为硫代硫酸钠。
所述步骤(1)硫源和铁源的摩尔比为(1~2):1,碳源的质量g:铁源的摩尔量mol的比为(0.4~2.0):0.01,碳纳米管的质量g:铁源的摩尔量mol的比为(0.25~1.0):0.01。
所述步骤(1)喷雾干燥的入口温度为160~220 ℃,出口温度为100~150 ℃。
本发明的另一目的是提供FeSx/C/CNT复合负极材料的制备方法所制备的FeSx/C/CNT复合负极材料。
FeSx/C/CNT复合负极材料在锂电池负极中的应用:将FeSx/C/CNT复合负极材料、导电剂、黏合剂混合均匀并涂覆在金属集流体上即得锂电池负极,其中金属集流体为Cu或Cu合金,FeSx/C/CNT复合负极材料中FeSx的质量百分数为50%~80%。
将本发明的锂电池负极与常规锂电池正极、常规锂电池隔膜、常规锂电池电解液组装成锂电池,优选的,锂电池电解液的电解质为双(三氟甲基)磺酰基亚胺锂,溶剂为1,2-二甲氧基乙烷与1,2-二氧戊环的混合溶剂,其中1,2-二甲氧基乙烷与1,2-二氧戊环的体积比为1:1,双(三氟甲基)磺酰基亚胺锂的浓度为1 mol/L。
本发明的有益效果:
(1)本发明的FeSx/C/CNT复合负极材料具有良好的导电网络和很好的固硫能力,提高活性物质的利用率,赋予该负极高的比容量和优异的循环性能;室温下,在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量为630 mAh/g,库伦效率可达99%;
(2)本发明FeSx/C/CNT复合负极材料具有三维导电网络结构,作为锂电池负极具有高比容量、高循环性能。
附图说明
图1 为实施例1中FeSx/C/CNT复合材料的SEM图;
图2 为实施例1中FeSx/C/CNT复合材料的XRD图;
图3 为实施例1中FeSx/C/CNT复合材料的充放电曲线图;
图4 为实施例1中FeSx/C/CNT复合材料的充放电循环图。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明,但本发明的保护范围并不限于所述内容。
实施例1:一种FeSx/C/CNT复合负极材料的制备方法,具体步骤如下:
(1)将铁源(硫酸亚铁)溶解到去离子水中,然后加入碳源(葡萄糖)和碳纳米管并混合均匀,再加入硫源(硫代硫酸钠),溶解后喷雾干燥得到FeSx/C/CNT复合材料前驱体;其中铁源(硫酸亚铁)与硫源(硫代硫酸钠)的摩尔比为1:1,碳源(葡萄糖)的质量g:铁源(硫酸亚铁)的摩尔量mol的比为0.8:0.01,碳纳米管的质量g:铁源(硫酸亚铁)的摩尔量mol的比为0.4:0.01;喷雾干燥的入口温度为200℃,出口温度为130℃;
(2)将步骤(1)FeSx/C/CNT复合材料前驱体置于温度为500℃、惰性气体(氩气)氛围条件下煅烧5 h,随炉冷却,采用去离子水洗涤,然后真空干燥即得FeSx/C/CNT复合负极材料;
本实施例FeSx/C/CNT复合材料的SEM图如图1所示,从图1中可知,FeSx/C/CNT复合材料呈微米级的类球形结构,且FeSx均匀分散在C/CNT形成的球形导电网络中;多孔结构的C/CNT球形导电网络能提高FeSx/C/CNT复合材料的导电性;能缓解FeSx/C/CNT复合材料在充放电循环过程中的体积效应;多孔结构的C/CNT球形框架可以抑制多硫化物中间体的溶解,使FeSx/C/CNT复合材料拥有较高的比容量和优异的循环稳定性;
本实施例FeSx/C/CNT复合材料的XRD图如图2所示,从图2中可知,FeSx/C/CNT复合材料中的FeSx为Fe7S8,与标准卡片JCPDS: 01-071-0647相符合;
FeSx/C/CNT复合负极材料在锂电池负极中的应用:将FeSx/C/CNT复合负极材料、导电剂(乙炔黑)研钵研磨混合均匀得到负极活性物质粉末,将负极活性物质粉末加入到溶剂N-甲基-2-吡咯烷酮中混合均匀得到负极活性物质浆料;将黏合剂(PVDF)溶解于溶剂N-甲基-2-吡咯烷酮中得到黏合剂溶液;将负极活性物质浆料与黏合剂溶液混合均匀并涂覆在金属集流体(铜箔)上并真空干燥即得锂电池负极,其中FeSx/C/CNT复合负极材料、导电剂(乙炔黑)与黏合剂(PVDF)的质量比为8:1:1;
电化学性能测试:利用本实施例的锂电池负极、金属锂对电极、电解液1M LiTFSI-DOL/DME (v:v=1:1)、隔膜PP/PE/PP,在充满氩气的手套箱中组装扣式电池,并在电池测试***中测试电池的性能。充放电电流密度设置为200 mA/g,充放电截止电压限为1.0 ~ 3.0 V;本实施例FeSx/C/CNT复合材料的充放电曲线图如图3所示,从图3可知,放电平台为1.7 V,放电平台在循环过程中几乎不变;本实施例FeSx/C/CNT复合材料的充放电循环图如图4所示,从图4可知,FeSx/C/CNT复合材料在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量保持在630 mAh/g,库伦效率为99.2%。
实施例2:本实施例FeSx/C/CNT复合负极材料的制备方法与实施例1FeSx/C/CNT复合负极材料的制备方法基本一致,不同之处在于,碳源为羧甲基纤维素钠,碳源(羧甲基纤维素钠)的质量g:铁源(硫酸亚铁)的摩尔量mol的比为0.8:0.01;喷雾干燥的入口温度为220 ℃,出口温度为150 ℃;
本实施例电化学性能测试方法与实施例1相同,从本实施例FeSx/C/CNT复合材料的充放电曲线图可知,放电平台为1.7 V,放电平台在循环过程中几乎不变;从本实施例FeSx/C/CNT复合材料的充放电循环图;FeSx/C/CNT复合材料在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量保持在640 mAh/g,库伦效率为99.3%。
实施例3:本实施例FeSx/C/CNT复合负极材料的制备方法与实施例1FeSx/C/CNT复合负极材料的制备方法基本一致,不同之处在于,碳源为可溶性淀粉,碳源(可溶性淀粉)的质量g:铁源(硫酸亚铁)的摩尔量mol的比为0.6:0.01;喷雾干燥的入口温度为180℃,出口温度为120℃;
本实施例电化学性能测试方法与实施例1相同,从本实施例FeSx/C/CNT复合材料的充放电曲线图可知,放电平台为1.7 V,放电平台在循环过程中几乎不变;从本实施例FeSx/C/CNT复合材料的充放电循环图;FeSx/C/CNT复合材料在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量保持在610 mAh/g,库伦效率为99.1%。
实施例4:本实施例FeSx/C/CNT复合负极材料的制备方法与实施例1FeSx/C/CNT复合负极材料的制备方法基本一致,不同之处在于,铁源为氯化亚铁,碳源为聚丙烯腈,碳源(聚丙烯腈)的质量g:铁源(氯化亚铁)的摩尔量mol的比为1.2:0.01;碳纳米管的质量g:铁源(氯化亚铁)的摩尔量mol的比为0.6:0.01;喷雾干燥的入口温度为160℃,出口温度为100℃;
本实施例电化学性能测试方法与实施例1相同,从本实施例FeSx/C/CNT复合材料的充放电曲线图可知,放电平台为1.7 V,放电平台在循环过程中几乎不变;从本实施例FeSx/C/CNT复合材料的充放电循环图;FeSx/C/CNT复合材料在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量保持在620 mAh/g,库伦效率为99.2%。
实施例5:本实施例FeSx/C/CNT复合负极材料的制备方法与实施例1FeSx/C/CNT复合负极材料的制备方法基本一致,不同之处在于,铁源为硝酸亚铁,碳源为酚醛树脂,碳源(酚醛树脂)的质量g:铁源(硝酸亚铁)的摩尔量mol的比为0.5:0.01;碳纳米管的质量g:铁源(硝酸亚铁)的摩尔量mol的比为0.5:0.01;
本实施例电化学性能测试方法与实施例1相同,从本实施例FeSx/C/CNT复合材料的充放电曲线图可知,放电平台为1.7 V,放电平台在循环过程中几乎不变;从本实施例FeSx/C/CNT复合材料的充放电循环图;FeSx/C/CNT复合材料在200 mA/g电流密度下充放电循环,按FeSx/C/CNT复合材料计算,放电比容量保持在620 mAh/g,库伦效率为99.3%。
Claims (6)
1.一种FeSx/C/CNT复合负极材料的制备方法,其特征在于,具体步骤如下:
(1)将铁源溶解到去离子水中,然后加入碳源和碳纳米管并混合均匀,再加入硫源,溶解后喷雾干燥得到FeSx/C/CNT复合材料前驱体;
(2)将步骤(1)FeSx/C/CNT复合材料前驱体置于温度为500~600℃、惰性气体氛围条件下煅烧5~8 h,随炉冷却,采用去离子水洗涤,然后真空干燥即得FeSx/C/CNT复合负极材料。
2.根据权利要求1所述FeSx/C/CNT复合负极材料的制备方法,其特征在于:步骤(1)中铁源为硫酸亚铁、硫酸铁、绿化亚铁、硝酸亚铁或硝酸铁,碳源为葡萄糖、蔗糖、可溶性淀粉、聚丙烯腈、聚乙烯吡咯烷酮、聚乙二醇、聚乙烯醇、聚偏氟乙烯、羧甲基纤维素钠、聚吡咯、酚醛树脂或沥青,硫源为硫代硫酸钠。
3.根据权利要求1所述FeSx/C/CNT复合负极材料的制备方法,其特征在于:步骤(1)硫源和铁源的摩尔比为(1~2):1,碳源的质量g:铁源的摩尔量mol的比为(0.4~2.0):0.01,碳纳米管的质量g:铁源的摩尔量mol的比为(0.25~1.0):0.01。
4.根据权利要求1所述FeSx/C/CNT复合负极材料的制备方法,其特征在于:步骤(1)喷雾干燥的入口温度为160~220℃,出口温度为100~150℃。
5.权利要求1~4任一项所述FeSx/C/CNT复合负极材料的制备方法所制备的FeSx/C/CNT复合负极材料。
6.权利要求5的FeSx/C/CNT复合负极材料在锂电池负极中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811242146.1A CN109585804A (zh) | 2018-10-24 | 2018-10-24 | 一种FeSx/C/CNT复合负极材料的制备方法及应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811242146.1A CN109585804A (zh) | 2018-10-24 | 2018-10-24 | 一种FeSx/C/CNT复合负极材料的制备方法及应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109585804A true CN109585804A (zh) | 2019-04-05 |
Family
ID=65920442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811242146.1A Pending CN109585804A (zh) | 2018-10-24 | 2018-10-24 | 一种FeSx/C/CNT复合负极材料的制备方法及应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109585804A (zh) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110265651A (zh) * | 2019-07-09 | 2019-09-20 | 厦门大学 | 一种非水电解液电池及其制备方法 |
CN110492080A (zh) * | 2019-08-27 | 2019-11-22 | 天津大学 | 用于锂离子电池负极的碳/三氧化二铁/多壁碳纳米管复合材料及制备方法 |
CN110518228A (zh) * | 2019-09-17 | 2019-11-29 | 安徽大学 | 一种包埋无机纳米粒子的三维石墨烯碳纳米复合材料及其应用 |
CN112018344A (zh) * | 2020-07-13 | 2020-12-01 | 昆明理工大学 | 碳包覆硫化镍电极材料及其制备方法和应用 |
CN113511710A (zh) * | 2021-05-27 | 2021-10-19 | 安徽中科索纳新材料科技有限公司 | 一种电容吸附铅离子用电极活性材料及其制备方法和应用 |
CN114639815A (zh) * | 2022-04-08 | 2022-06-17 | 东莞市沃泰通新能源有限公司 | 钠离子电池负极材料的制备方法、负极片及钠离子电池 |
CN114678516A (zh) * | 2022-04-18 | 2022-06-28 | 齐鲁工业大学 | 一种Fe7S8-CNTs/S复合锂硫电池正极材料及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102760877A (zh) * | 2012-07-23 | 2012-10-31 | 浙江大学 | 过渡金属硫化物/石墨烯复合材料及其制备方法和应用 |
CN104362296A (zh) * | 2014-11-21 | 2015-02-18 | 厦门大学 | 一种新型硫基材料电极及其制备方法与应用 |
CN106532144A (zh) * | 2016-12-23 | 2017-03-22 | 中物院成都科学技术发展中心 | 一种三元复合热电池电极材料及其制备方法 |
CN106992293A (zh) * | 2017-05-22 | 2017-07-28 | 浙江大学 | 金属硫化物及碳的复合材料的制备方法及其在钠离子电池中的应用 |
-
2018
- 2018-10-24 CN CN201811242146.1A patent/CN109585804A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102760877A (zh) * | 2012-07-23 | 2012-10-31 | 浙江大学 | 过渡金属硫化物/石墨烯复合材料及其制备方法和应用 |
CN104362296A (zh) * | 2014-11-21 | 2015-02-18 | 厦门大学 | 一种新型硫基材料电极及其制备方法与应用 |
CN106532144A (zh) * | 2016-12-23 | 2017-03-22 | 中物院成都科学技术发展中心 | 一种三元复合热电池电极材料及其制备方法 |
CN106992293A (zh) * | 2017-05-22 | 2017-07-28 | 浙江大学 | 金属硫化物及碳的复合材料的制备方法及其在钠离子电池中的应用 |
Non-Patent Citations (2)
Title |
---|
D. ZHANG等: "FeS2/C composite as an anode for lithium ion batteries with enhanced reversible capacity", 《JOURNAL OF POWER SOURCES》 * |
JIAN XIONG等: "The facile preparation of hollow Fe3O4/C/CNT microspheres assisted by the spray drying method as an anode material for lithium-ion batteries", 《JOURNAL OF MATERIALS SCIENCE》 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110265651A (zh) * | 2019-07-09 | 2019-09-20 | 厦门大学 | 一种非水电解液电池及其制备方法 |
CN110265651B (zh) * | 2019-07-09 | 2021-04-30 | 厦门大学 | 一种非水电解液电池及其制备方法 |
CN110492080A (zh) * | 2019-08-27 | 2019-11-22 | 天津大学 | 用于锂离子电池负极的碳/三氧化二铁/多壁碳纳米管复合材料及制备方法 |
CN110492080B (zh) * | 2019-08-27 | 2022-03-11 | 天津大学 | 用于锂离子电池负极的碳/三氧化二铁/多壁碳纳米管复合材料及制备方法 |
CN110518228A (zh) * | 2019-09-17 | 2019-11-29 | 安徽大学 | 一种包埋无机纳米粒子的三维石墨烯碳纳米复合材料及其应用 |
CN112018344A (zh) * | 2020-07-13 | 2020-12-01 | 昆明理工大学 | 碳包覆硫化镍电极材料及其制备方法和应用 |
CN113511710A (zh) * | 2021-05-27 | 2021-10-19 | 安徽中科索纳新材料科技有限公司 | 一种电容吸附铅离子用电极活性材料及其制备方法和应用 |
CN114639815A (zh) * | 2022-04-08 | 2022-06-17 | 东莞市沃泰通新能源有限公司 | 钠离子电池负极材料的制备方法、负极片及钠离子电池 |
CN114678516A (zh) * | 2022-04-18 | 2022-06-28 | 齐鲁工业大学 | 一种Fe7S8-CNTs/S复合锂硫电池正极材料及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109585804A (zh) | 一种FeSx/C/CNT复合负极材料的制备方法及应用 | |
He et al. | Challenges and strategies of zinc anode for aqueous zinc-ion batteries | |
CN103078092B (zh) | 一种制备锂离子电池硅碳复合负极材料的方法 | |
WO2019091067A1 (zh) | 一种锂离子电池用氮硫共掺杂碳包覆锡/二硫化钼复合材料及其制备方法 | |
CN109437123B (zh) | 硒掺杂的二硫化亚铁碳包覆复合材料及其制备方法和应用 | |
Guo et al. | Silicon-loaded lithium-carbon composite microspheres as lithium secondary battery anodes | |
CN113839038A (zh) | MOF衍生的Bi@C纳米复合电极材料及其制备方法 | |
CN106960954B (zh) | 一种普鲁士蓝/石墨烯/硫复合材料的制备方法及应用 | |
CN109755489B (zh) | 一种氟磷酸钒钠/碳复合物的制备及复合物的应用 | |
CN108777294B (zh) | 一种由纳米片组成的碳支持的多孔球形MoN及其作为负极材料在锂电池中的应用 | |
CN111354933B (zh) | 一种应用于锂硫电池正极材料的氮化钨/氮掺杂石墨烯/氧化钨复合材料的制备方法 | |
CN108321438B (zh) | 全石墨锂硫电池及其制备方法 | |
CN110148730A (zh) | 一种高首效长寿命硅基负极材料及其制备方法和应用 | |
CN110148735B (zh) | 一种自支撑石墨相氮化碳/导电高分子复合硫正极材料的制备方法 | |
CN104362316A (zh) | 一种锂硫电池复合正极材料及其制备方法与应用 | |
CN111276678A (zh) | 单层石墨烯包覆FeS2/碳纳米管材料的制备方法及应用 | |
CN106450423B (zh) | 一种高比能柔性一体化电极及其制备方法 | |
CN105244474A (zh) | 一种高比容量锂硫二次电池复合正极及其制备方法 | |
CN111304679B (zh) | 一种电化学离子提取法电解制备高纯六氟磷酸锂的装置和方法 | |
CN109860536A (zh) | 一种富锂锰基材料及其制备方法和应用 | |
CN105304866B (zh) | 一种含金属镁粉的锂硫电池正极及其制备方法 | |
CN109686943A (zh) | 一种金属硫化物原位包覆碳的负极材料的制备方法 | |
CN113241431A (zh) | 一种ZnS纳米花@NC的锂离子电池负极材料的制法和应用 | |
CN110556537B (zh) | 一种改善阴离子嵌入型电极材料电化学性能的方法 | |
CN106981635A (zh) | 一种Nafion膜/Ti3C2Tx/硫复合材料 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190405 |