Invention Application
- Patent Title: NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY INCLUDING THE SAME
- Patent Title (中): 用于非水电解质二次电池和非电解电解质二次电池的负极
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Application No.: US14855604Application Date: 2015-09-16
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Publication No.: US20160087264A1Publication Date: 2016-03-24
- Inventor: Norikazu OSADA , Takashi KUBOKl , Shinsuke MATSUNO
- Applicant: Kabushiki Kaisha Toshiba
- Applicant Address: JP Minato-ku
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Minato-ku
- Priority: JP2014-191181 20140919
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/133 ; H01M4/587 ; H01M4/38 ; H01M4/485 ; H01M4/131 ; H01M4/134

Abstract:
A negative electrode for a nonaqueous electrolyte secondary battery of the embodiment includes a current collector; and an electrode mixture layer that is formed on the current collector and contains a first particle, a second particle and a binder. The first particle is comprised of silicon, a silicon oxide and a carbonaceous material. The second particle has electron conductivity and an oxygen content of 1% or lower. The electrode mixture layer is characterized in that silicon concentrations in the vicinity of the surface having contact with the current collector and the vicinity of the opposite surface to the surface having contact with the current collector are higher than a silicon concentration at the central part in the thickness direction.
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