Invention Grant
- Patent Title: Nonaqueous electrolyte secondary battery and method for producing same
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Application No.: US16640159Application Date: 2018-10-10
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Publication No.: US11508987B2Publication Date: 2022-11-22
- Inventor: Tomohiro Harada , Hiroshi Minami
- 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: JPJP2017-209839 20171030
- International Application: PCT/JP2018/037638 WO 20181010
- International Announcement: WO2019/087709 WO 20190509
- Main IPC: H01M4/485
- IPC: H01M4/485 ; H01M10/052 ; H01M4/04 ; H01M4/38 ; H01M4/66 ; H01M10/0587 ; H01M4/02

Abstract:
The nonaqueous electrolyte secondary battery comprises the following: a positive electrode including a positive electrode active material that includes a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector wherein lithium metal deposits on the negative electrode current collector during charging, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The molar ratio of the total amount of lithium held by the positive electrode and the negative electrode to the amount of transition metal in the positive electrode is not more than 1.1. In addition, in the discharged state, a space layer is present between the negative electrode and the separator, and the positive electrode capacity per unit area, α (mAh/cm2), of the positive electrode and the average in thickness, X (μm), of the space layer 50 satisfy 0.05≤α/X≤0.2.
Public/Granted literature
- US20210159536A1 NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING SAME Public/Granted day:2021-05-27
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