发明公开
- 专利标题: GRANULAR COMPOSITE FOR MANUFACTURING NEGATIVE ELECTRODE OF LITHIUM-ION SECONDARY CELL
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申请号: EP16851938.7申请日: 2016-10-01
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公开(公告)号: EP3358658A1公开(公告)日: 2018-08-08
- 发明人: KURITA, Takayuki , MATSUO, Akira , ISHII, Nobuaki
- 申请人: Showa Denko K.K.
- 申请人地址: 13-9 Shibadaimon 1-chome Minato-ku Tokyo 105-8518 JP
- 专利权人: Showa Denko K.K.
- 当前专利权人: Showa Denko K.K.
- 当前专利权人地址: 13-9 Shibadaimon 1-chome Minato-ku Tokyo 105-8518 JP
- 代理机构: Strehl Schübel-Hopf & Partner
- 优先权: JP2015196271 20151001
- 国际公布: WO2017057769 20170406
- 主分类号: H01M4/587
- IPC分类号: H01M4/587 ; H01M4/36 ; H01M4/38
摘要:
A negative electrode for a lithium ion secondary battery in which an electrode layer and a collector are laminated is obtained by a method comprising: mixing particles (A) composed of a substance comprising an element capable of intercalating and deintercalating lithium ions and comprising no graphite, particles (B) composed of a substance comprising graphite, carbonaceous fibers (C), and a polymer (D) comprising a polysaccharide comprising an unsubstituted or substituted glucopyranose ring or a derivative of the polysaccharide and having a viscosity in 1 mass% aqueous solution at 25°C of 300-6,000 mPa·s to obtain a granular composite in which each one of the particles (A) and each one of the carbonaceous fibers (C) have contact with each other through the polymer (D) to be integrated, thereby forming a substructure (S), at least a part of surface of each one of the particles (B) is covered with the substructure (S), and each one of the particles (B) has contact with each other through the substructure (S); mixing a liquid medium, the granular composite and a binder to obtain slurry or paste; and allowing the slurry or the paste to adhere to the collector.
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