Invention Grant
- Patent Title: Negative electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery
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Application No.: US16640216Application Date: 2018-12-14
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Publication No.: US12170362B2Publication Date: 2024-12-17
- Inventor: Kaori Ishikawa , Yuta Matsuo , Daisuke Ito , Kouhei Tsuzuki
- Applicant: Panasonic Corporation , SANYO Electric Co., Ltd.
- Applicant Address: JP Kadoma; JP Daito
- Assignee: Panasonic Corporation,SANYO Electric Co., Ltd.
- Current Assignee: Panasonic Corporation,SANYO Electric Co., Ltd.
- Current Assignee Address: JP Kadoma; JP Daito
- Agency: WHDA, LLP
- Priority: JP2017-252477 20171227
- International Application: PCT/JP2018/046008 WO 20181214
- International Announcement: WO2019/131195 WO 20190704
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/02 ; H01M4/133 ; H01M4/134 ; H01M4/66 ; H01M10/0525

Abstract:
A negative electrode for a nonaqueous electrolyte with a negative electrode mixture layer that includes a first layer and a second layer. The first layer is formed on the negative electrode current collector and includes a negative electrode active material and a first binding agent. The negative electrode active material in the first layer includes a carbon material A and a Si-containing compound. The first binding agent includes polyacrylic acid or a salt thereof. The second layer is formed on the first layer and includes a negative electrode active material and a second binding agent. The negative electrode active material in the second layer includes a carbon material B. The carbon material B has a tap density higher than a tap density of the carbon material A. A packing density of the second layer is lower than a packing density of the first layer.
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