Invention Grant
- Patent Title: Negative electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery
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Application No.: US14762961Application Date: 2014-01-10
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Publication No.: US09711783B2Publication Date: 2017-07-18
- Inventor: Kazuto Fukuda , Ayano Toyoda , Shouichiro Sawa , Taizou Sunano
- Applicant: SANYO Electric Co., Ltd. , Panasonic Corporation
- Applicant Address: JP Daito-shi JP Kadoma-shi
- Assignee: SANYO Electric Co., Ltd.,PANASONIC Corporation
- Current Assignee: SANYO Electric Co., Ltd.,PANASONIC Corporation
- Current Assignee Address: JP Daito-shi JP Kadoma-shi
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2013-016082 20130130; JP2013-059362 20130322
- International Application: PCT/JP2014/000080 WO 20140110
- International Announcement: WO2014/119229 WO 20140807
- Main IPC: H01M4/02
- IPC: H01M4/02 ; H01M4/134 ; H01M4/38 ; H01M4/62 ; H01M10/052

Abstract:
A negative electrode for a nonaqueous electrolyte secondary battery according to one aspect of the present invention includes a negative electrode mixture layer that contains a binder and a negative electrode active material particle that forms an alloy with lithium and is formed on a current collector. The negative electrode mixture layer includes a base portion near the current collector and pillar-shaped portions formed on the base portion. A negative electrode for a nonaqueous electrolyte secondary battery according to another aspect of the present invention includes a negative electrode mixture layer that contains a binder and a negative electrode active material particle that forms an alloy with lithium and is formed on a current collector. The negative electrode mixture layer includes pillar-shaped portions and the particle diameter of the negative electrode active material particle is 20% or less of the maximum diameter of the pillar-shaped portions.
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