- Patent Title: Negative electrode active material for nonaqueous electrolyte secondary batteries, negative electrode for nonaqueous electrolyte secondary batteries, and nonaqueous electrolyte secondary battery
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Application No.: US17267979Application Date: 2019-08-01
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Publication No.: US11978896B2Publication Date: 2024-05-07
- Inventor: Toshiyuki Nakamori , Yasunobu Iwami , Mai Yokoi , Yohei Uchiyama
- 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: WHDA, LLP
- Priority: JP 18161948 2018.08.30
- International Application: PCT/JP2019/030199 2019.08.01
- International Announcement: WO2020/044931A 2020.03.05
- Date entered country: 2021-02-11
- Main IPC: H01M4/48
- IPC: H01M4/48 ; H01M4/02 ; H01M4/36 ; H01M4/38 ; H01M10/0525
Abstract:
A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).
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