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CN105981204A 非水电解质二次电池的负极材料用的负极活性物质、非水电解质二次电池用负极电极、以及非水电解质二次电池 有权

  • Patent Title: 非水电解质二次电池的负极材料用的负极活性物质、非水电解质二次电池用负极电极、以及非水电解质二次电池
  • Patent Title (English): Negative electrode active material for negative electrode material of non-aqueous electrolyte secondary battery, negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery
  • Application No.: CN201580007499.1
    Application Date: 2015-01-26
  • Publication No.: CN105981204A
    Publication Date: 2016-09-28
  • Inventor: 广瀬贵一 , 加茂博道 , 吉川博树
  • Applicant: 信越化学工业株式会社
  • Applicant Address: 日本东京都
  • Assignee: 信越化学工业株式会社
  • Current Assignee: 信越化学工业株式会社
  • Current Assignee Address: 日本东京都
  • Agency: 隆天知识产权代理有限公司
  • Agent 李英艳
  • Priority: 2014-022159 2014.02.07 JP
  • International Application: PCT/JP2015/000321 2015.01.26
  • International Announcement: WO2015/118830 JA 2015.08.13
  • Date entered country: 2016-08-05
  • Main IPC: H01M4/485
  • IPC: H01M4/485 ;  H01M4/131 ;  H01M4/36 ;  H01M4/48
非水电解质二次电池的负极材料用的负极活性物质、非水电解质二次电池用负极电极、以及非水电解质二次电池
Abstract:
本发明是一种负极活性物质，其是非水电解质二次电池的负极材料用的负极活性物质，所述负极活性物质的特征在于，前述负极活性物质含有硅类材料SiOx，且0.5≤x≤1.6，所述硅类材料包含Li6Si2O7、Li2Si3O5、Li4SiO4中的至少1种以上；并且，在前述负极活性物质的至少一部分表层包含已结晶化的氟化合物、或具有‑CF2‑CF2‑单元的化合物，或者包含所述这两种化合物。由此，本发明提供一种负极活性物质、锂离子二次电池，所述负极活性物质在作为锂离子二次电池的负极活性物质使用时，能够增加电池容量并提高循环特性和初始充放电特性，所述锂离子二次电池具有使用此负极活性物质而成的负极电极。
Abstract(English):

This negative electrode active material for a negative electrode material of a non-aqueous electrolyte secondary battery is characterized by including a silicon-based material (SiOx:0.5<=x<=1.6) including at least one from among Li6Si2O7, Li2Si3O5, and Li4SiO4. The negative electrode active material is further characterized in that at least a portion of a surface layer of the negative electrode active material includes a crystallized fluorine compound and/or a compound having -CF2-CF2- units. Accordingly, provided are: a negative electrode active material which, when used as a negative electrode active material of a lithium-ion secondary battery, is capable of increasing battery capacity and improving cycle characteristics and initial charge/discharge characteristics; and a lithium-ion secondary battery provided with a negative electrode in which said negative electrode active material is used.

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