Invention Grant
- Patent Title: Nonaqueous lithium power storage element
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Application No.: US16070425Application Date: 2017-01-20
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Publication No.: US10886533B2Publication Date: 2021-01-05
- Inventor: Kazuteru Umetsu , Nobuhiro Okada , Koichi Hiraoka , Atsushi Hosokibara , Taku Suetomi
- Applicant: Asahi Kasei Kabushiki Kaisha
- Applicant Address: JP Tokyo
- Assignee: Asahi Kasei Kabushiki Kaisha
- Current Assignee: Asahi Kasei Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Morgan, Lewis & Bockius LLP
- Priority: JP2016-010895 20160122,JP2016-155805 20160808,JP2016-192443 20160930,JP2016-192745 20160930
- International Application: PCT/JP2017/002008 WO 20170120
- International Announcement: WO2017/126689 WO 20170727
- Main IPC: H01M4/58
- IPC: H01M4/58 ; H01M4/02 ; H01G11/50 ; H01G11/52 ; H01G11/70 ; H01M10/0585 ; H01G11/38 ; H01M10/0567 ; H01M10/052 ; H01G11/06 ; H01G11/24 ; H01M4/1393 ; H01G11/58 ; H01G11/78 ; H01M10/0525 ; H01M10/0568 ; H01M10/0569 ; H01G11/62 ; H01G11/60 ; H01G11/26 ; H02J9/00

Abstract:
Provided is a nonaqueous lithium power storage element that can suppress excessive decomposition of a lithium compound remaining in a positive electrode, can suppress gas generation at high voltages, and can suppress capacity declines during high-load charge/discharge cycling. The nonaqueous lithium power storage element according to the present embodiment has a positive electrode that contains a lithium compound other than an active material, a negative electrode, a separator, and a lithium ion-containing nonaqueous electrolyte, wherein in the elemental map provided by SEM-EDX of the surface of the positive electrode, the area overlap ratio U1 of the fluorine map relative to the oxygen map, as provided by binarization based on the average value of the brightness values, is 40% to 99%.
Public/Granted literature
- US20190020030A1 Nonaqueous Lithium Power Storage Element Public/Granted day:2019-01-17
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