Invention Grant
- Patent Title: Non-aqueous electrolyte secondary cell
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Application No.: US16640223Application Date: 2018-10-10
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Publication No.: US11616228B2Publication Date: 2023-03-28
- 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: JPJP2017-209822 20171030
- International Application: PCT/JP2018/037637 WO 20181010
- International Announcement: WO2019/087708 WO 20190509
- Main IPC: H01M4/485
- IPC: H01M4/485 ; H01M4/525 ; H01M4/131 ; H01M4/134 ; H01M4/66 ; H01M10/0525 ; H01M10/0587 ; H01M50/107 ; H01M4/02

Abstract:
The non-aqueous electrolyte secondary cell according to the present invention comprises: an electrode body constituted by a positive electrode including a positive electrode active material comprising a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector onto which metallic lithium is deposited during charging, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The molar ratio of the total lithium content of the positive electrode and the negative electrode to the transition metal content of the positive electrode is 1.1 or less. During discharging, the positive electrode capacitance α(mAh) of the positive electrode and the volume X (mm3) of a hollow constituted by a space formed in the center of the electrode body 14 satisfy the relationship 0.5≤X/α≤4.0.
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