Invention Grant
- Patent Title: Negative electrode for secondary battery, secondary battery, battery pack, electric vehicle, power storage system, power tool, and electronic device
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Application No.: US16039482Application Date: 2018-07-19
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Publication No.: US11695119B2Publication Date: 2023-07-04
- Inventor: Takatoshi Munaoka , Masayuki Ihara , Shigeru Fujita , Takuju Hashimoto
- Applicant: MURATA MANUFACTURING CO., LTD.
- Applicant Address: JP Kyoto
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: K&L Gates LLP
- Priority: JP 2016015298 2016.01.29
- Main IPC: H01M4/62
- IPC: H01M4/62 ; H01M4/134 ; H01M4/133 ; H01M50/119 ; H01M50/121 ; H01M50/126 ; H01M4/38 ; H01M10/42 ; H01M10/0587 ; H01M10/0569 ; H01M10/0568 ; H01M10/0567 ; B60K6/28 ; H01M4/587 ; H01M10/0525 ; H01M4/02

Abstract:
The secondary battery includes an electrolytic solution, a positive electrode and a negative electrode, and the negative electrode includes a plurality of particulate negative electrode active materials, a first negative electrode binder, and a plurality of second negative electrode binders with an average particle size smaller than the plurality of particulate negative electrode active materials. The plurality of particulate negative electrode active materials have an average particle size of 5 μm or more and 30 μm or less. The first negative electrode binder includes one or both of a styrene butadiene rubber and a derivative thereof. The plurality of second negative electrode binders include one or both of a polyvinylidene fluoride and a derivative thereof, and the plurality of second negative electrode binders have an average particle size of 0.1 μm or more and 10 μm or less.
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