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1. WO2020138313 - COMPOSITE PARTICLE FOR NEGATIVE ELECTRODE OF LITHIUM ION SECONDARY BATTERY

Publication Number WO/2020/138313
Publication Date 02.07.2020
International Application No. PCT/JP2019/051181
International Filing Date 26.12.2019
IPC
C01B 33/02 2006.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
33Silicon; Compounds thereof
02Silicon
H01M 4/36 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
H01M 4/38 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
H01M 4/587 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
C01B 32/05 2017.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
32Carbon; Compounds thereof
05Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30178
C01B 32/205 2017.01
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF
32Carbon; Compounds thereof
20Graphite
205Preparation
CPC
C01B 32/05
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
32Carbon; Compounds thereof
05Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
C01B 32/205
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
32Carbon; Compounds thereof
20Graphite
205Preparation
C01B 33/02
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
33Silicon; Compounds thereof
02Silicon
H01M 4/36
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
H01M 4/38
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
H01M 4/587
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
Applicants
  • 昭和電工株式会社 SHOWA DENKO K.K. [JP]/[JP]
Inventors
  • 近藤 邦夫 KONDO, Kunio
  • 川崎 俊哉 KAWASAKI, Toshiya
  • 井上 浩文 INOUE, Hirofumi
  • 栗谷 真澄 KURITANI, Masumi
Agents
  • 菊間 忠之 KIKUMA Tadayuki
Priority Data
2018-24264826.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) COMPOSITE PARTICLE FOR NEGATIVE ELECTRODE OF LITHIUM ION SECONDARY BATTERY
(FR) PARTICULES COMPOSITES POUR ÉLECTRODE NÉGATIVE DE BATTERIE SECONDAIRE AU LITHIUM-ION
(JA) リチウムイオン二次電池の負極用の複合粒子
Abstract
(EN)
In this invention, through a method including mixing together porous silicon particles and a carbon precursor, and heat processing the obtained mixture to graphitize or carbonize the carbon precursor, composite particles containing a carbon material and Si-containing particles are obtained, wherein the porosity is 30 to 50% in a range from the complex particle center to 80% of the complex particle diameter, and the ratio, of the porosity in the range from the complex particle external surface to 10% of the complex particle diameter with respect to the porosity in the range from the complex particle center to 80% of the complex particle diameter, is 0.5 or lower.
(FR)
L'invention fournit des particules composites qui contiennent des particules à teneur en Si et un matériau carbone. Lesquelles particules composites sont obtenues selon un procédé qui inclut une étape au cours de laquelle des particules poreuses de silicium et un précurseur de carbone sont mélangés, le mélange ainsi obtenu est soumis à un traitement thermique, et le précurseur de carbone subit une graphitisation ou une carbonisation. La porosité des particules composites dans une plage de leur centre à 80% de leur diamètre, est comprise entre 30 et 50%. Le rapport de la porosité des particules composites dans une plage de leur surface externe à 10% de leur diamètre vis-à-vis de la porosité des particules composites dans une plage de leur centre à 80% de leur diamètre, est inférieur ou égal à 0,5.
(JA)
多孔質シリコン粒子と炭素前駆体とを混ぜ合わせ、得られた混合物を熱処理して炭素前駆体を黒鉛化または炭素化することを含む、方法によって、複合粒子の中心から複合粒子の直径の80%までの範囲の空隙率が30~50%であり、且つ複合粒子の中心から複合粒子の直径の80%までの範囲の空隙率に対する複合粒子の外表面から複合粒子の直径の10%までの範囲の空隙率の比が0.5以下である、Si含有粒子と炭素材料とを含む複合粒子を得る。
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