Title:
ケイ素－炭素複合材料及びその製造方法
Document Type and Number:
Japanese Patent JP7068546
Kind Code:
B2
Abstract:
A silicon-carbon composite material includes a matrix core, a silicon-carbon composite shell formed by uniformly dispersing nano silicon particles in conductive carbon, and a coating layer. The nano silicon particles are formed by high-temperature pyrolysis of a silicon source, and the conductive carbon is formed by high-temperature pyrolysis of an organic carbon source. The coating layer is a carbon coating layer including at least one layer, and the thickness of its single layer is 0.2-3 μm. A silicon-carbon composite material precursor is formed by simultaneous vapor deposition and is then subjected to carbon coating to form the pitaya-like silicon-carbon composite material which has advantages of high first-cycle efficiency, low expansion and long cycle. The grain growth of the silicon material is slowed down during the heat treatment process, the pulverization of the material is effectively avoided, and the cycle performance, conductivity and rate performance of the material are enhanced.
Inventors:
晏犖
Chung Anhua
Eternal army
Chung Anhua
Eternal army
Application Number:
JP2021508047A
Publication Date:
May 16, 2022
Filing Date:
April 11, 2019
Export Citation:
Assignee:
Guangdong Kaijin New Energy Technology Co., Ltd.
International Classes:
C01B33/02; H01M4/36; H01M4/38; H01M4/48
Foreign References:
| CN108390049A | ||||
| CN109119627A |
Attorney, Agent or Firm:
sk patent corporation
Akihiko Okuno
Hiroyuki Ito
Akihiko Okuno
Hiroyuki Ito
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