WO2021092869A1 - 负极材料及包含其的电化学装置和电子装置 - Google Patents
负极材料及包含其的电化学装置和电子装置 Download PDFInfo
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- WO2021092869A1 WO2021092869A1 PCT/CN2019/118586 CN2019118586W WO2021092869A1 WO 2021092869 A1 WO2021092869 A1 WO 2021092869A1 CN 2019118586 W CN2019118586 W CN 2019118586W WO 2021092869 A1 WO2021092869 A1 WO 2021092869A1
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- Prior art keywords
- negative electrode
- electrode material
- silicon
- layer
- carbon
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- DEUISMFZZMAAOJ-UHFFFAOYSA-N lithium dihydrogen borate oxalic acid Chemical compound B([O-])(O)O.C(C(=O)O)(=O)O.C(C(=O)O)(=O)O.[Li+] DEUISMFZZMAAOJ-UHFFFAOYSA-N 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 description 1
- IGILRSKEFZLPKG-UHFFFAOYSA-M lithium;difluorophosphinate Chemical compound [Li+].[O-]P(F)(F)=O IGILRSKEFZLPKG-UHFFFAOYSA-M 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000005543 nano-size silicon particle Substances 0.000 description 1
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- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
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- 238000004080 punching Methods 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
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- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 1
- ZSDSQXJSNMTJDA-UHFFFAOYSA-N trifluralin Chemical compound CCCN(CCC)C1=C([N+]([O-])=O)C=C(C(F)(F)F)C=C1[N+]([O-])=O ZSDSQXJSNMTJDA-UHFFFAOYSA-N 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- 238000004804 winding Methods 0.000 description 1
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Images
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Abstract
Description
Claims (19)
- 一种负极材料,其包括含硅颗粒,所述含硅颗粒包括硅复合物基体和聚合物层,所述聚合物层包覆所述硅复合物基体的至少一部分,并且所述聚合物层包含碳材料。
- 根据权利要求1所述的负极材料,其中所述硅复合物基体包括SiO x,且约0.6≤x≤约1.5。
- 根据权利要求1所述的负极材料,其中所述硅复合物基体包括纳米Si晶粒、SiO、SiO 2或其任意组合。
- 根据权利要求3所述的负极材料,其中所述纳米Si晶粒的尺寸为小于约100nm。
- 根据权利要求1所述的负极材料,其中所述聚合物层包含聚偏氟乙烯及其衍生物、羧甲基纤维素及其衍生物、羧甲基纤维素钠及其衍生物、聚乙烯基吡咯烷酮及其衍生物、聚丙烯酸及其衍生物、聚丁苯橡胶、聚丙烯酰胺、聚酰亚胺、聚酰胺酰亚胺或其任意组合。
- 根据权利要求1所述的负极材料,其中所述碳材料包含碳纳米管、碳纳米颗粒、碳纤维、石墨烯或其任意组合。
- 根据权利要求1所述的负极材料,其中基于所述负极材料的总重量,所述聚合物层的重量百分比为约0.05-15wt%。
- 根据权利要求1所述的负极材料,其中所述聚合物层的厚度为约1nm-200nm。
- 根据权利要求1所述的负极材料,其在X射线衍射图案中2θ归属于约27.5°-29.0°范围内最高强度数值为I 2,归属于约20.5°-22.0°范围内最高强度数值为I 1,其中约0<I 2/I 1≤约1。
- 根据权利要求9所述的负极材料,其中所述含硅颗粒的D V50的范围为约2.5-20μm,且所述含硅颗粒的粒径分布满足:约0.25≤Dn10/Dv50≤约0.6。
- 根据权利要求10所述的负极材料,其中所述含硅颗粒进一步包括氧化物MeO y层, 所述氧化物MeO y层位于所述硅复合物基体和所述聚合物层之间,其中Me包括Al、Si、Ti、Mn、V、Cr、Co或Zr中的至少一种,其中y为约0.5-3;且其中所述氧化物MeO y层包含碳材料。
- 根据权利要求11所述的负极材料,其中所述氧化物MeO y层的厚度为约1nm-800nm。
- 根据权利要求11所述的负极材料,其中基于所述负极材料的总重量,Me元素的重量百分比为约0.001wt%-0.9wt%。
- 根据权利要求1所述的负极材料,其比表面积为约1-50m 2/g。
- 一种制备负极材料的方法,所述方法包括:将SiO x粉末、碳材料和聚合物在溶剂中高速分散约1-20h得到悬浮液;和去除所述悬浮液中的溶剂,其中约0.5<x<约1.5。
- 一种负极,其包含如权利要求1-14中任一项所述的负极材料。
- 一种电化学装置,其包含如权利要求16所述的负极。
- 根据权利要求17所述的电化学装置,其为锂离子电池。
- 一种电子装置,其包含如权利要求18所述的电化学装置。
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JP2021518004A JP7163489B2 (ja) | 2019-11-14 | 2019-11-14 | 負極材料、それを含む電気化学デバイス、及び電子装置 |
PCT/CN2019/118586 WO2021092869A1 (zh) | 2019-11-14 | 2019-11-14 | 负极材料及包含其的电化学装置和电子装置 |
EP19946251.6A EP4060767A4 (en) | 2019-11-14 | 2019-11-14 | NEGATIVE ELECTRODE MATERIAL, ELECTROCHEMICAL DEVICE COMPRISING THE SAME, AND ELECTRONIC DEVICE |
KR1020217009488A KR102661770B1 (ko) | 2019-11-14 | 2019-11-14 | 음극재료 및 이를 포함한 전기화학장치와 전자장치 |
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