Invention Grant
- Patent Title: Negative electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
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Application No.: US16325557Application Date: 2017-08-22
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Publication No.: US10903485B2Publication Date: 2021-01-26
- Inventor: Masanori Sugimori , Yasunori Baba , Katsunori Yanagida
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2016-170099 20160831
- International Application: PCT/JP2017/029843 WO 20170822
- International Announcement: WO2018/043188 WO 20180308
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/131 ; H01M4/485 ; H01M4/62 ; H01M4/60 ; H01M10/0525 ; H01M4/02

Abstract:
A negative electrode for nonaqueous electrolyte secondary batteries includes a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and the negative electrode mixture layer contains a negative electrode active material containing lithium titanate, a binder, and a (meth)acrylic acid-based polymer. The amount of the (meth)acrylic acid-based polymer in the negative electrode mixture layer is 10 mass % or less relative to the total amount of the (meth)acrylic acid-based polymer and the binder. The amount of the (meth)acrylic acid-based polymer in a portion of the negative electrode mixture layer that extends from the surface to the middle of the negative electrode mixture layer in the thickness direction (upper region) is 60 mass % or more relative to the total amount of the (meth)acrylic acid-based polymer.
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