Invention Grant
- Patent Title: Lithium-ion secondary battery, negative electrode for lithium-ion secondary battery, battery pack, electric vehicle, power storage system, electric tool, and electronic device
- Patent Title (中): 锂离子二次电池，锂离子二次电池用负极，电池组，电动车，蓄电系统，电动工具及电子装置
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Application No.: US13526133Application Date: 2012-06-18
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Publication No.: US09048485B2Publication Date: 2015-06-02
- Inventor: Takakazu Hirose , Kenichi Kawase , Takashi Fujinaga , Isao Koizumi , Toshio Nishi
- Applicant: Takakazu Hirose , Kenichi Kawase , Takashi Fujinaga , Isao Koizumi , Toshio Nishi
- Applicant Address: JP Tokyo
- Assignee: SONY CORPORATION
- Current Assignee: SONY CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: K&L Gates LLP
- Priority: JP2011-141005 20110624
- Main IPC: H01M4/38
- IPC: H01M4/38 ; H01M4/48 ; H01M4/131 ; H01M10/0525 ; H01M4/134 ; H01M4/62 ; H01M10/48
Abstract:
A lithium-ion secondary battery includes a positive electrode, a negative electrode containing an active material, and an electrolytic solution, in which the active material includes a core portion capable of occluding and releasing lithium ions, and a covering portion arranged on at least part of a surface of the core portion, in which the covering portion contains, as constituent elements, Si, O, and at least one element M1 selected from Li, C, Mg, Al, Ca, Ti, Cr, Mn, Fe, Co, Ni, Cu, Ge, Zr, Mo, Ag, Sn, Ba, W, Ta, Na, and K, and the atomic ratio y (O/Si) of O to Si is 0.5≦y≦1.8.
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