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公开(公告)号:US20220407069A1
公开(公告)日:2022-12-22
申请号:US17777479
申请日:2020-11-05
Applicant: GS Yuasa International Ltd.
Inventor: Kenta OGI , Yuhei ITAI , Kei KUMABAYASHI , Fumiya NAKANO
IPC: H01M4/587 , H01M4/1393 , H01M4/133
Abstract: An energy storage device according to one aspect of the present invention is an energy storage device including a negative electrode having a negative electrode substrate and a negative active material layer stacked on the negative electrode substrate directly or via another layer, and a nonaqueous electrolyte solution, in which the negative active material layer contains graphite and a solvent-based binder, and the negative active material layer is not subjected to pressing.
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公开(公告)号:US20240186514A1
公开(公告)日:2024-06-06
申请号:US18278532
申请日:2022-02-21
Applicant: GS Yuasa International Ltd.
Inventor: Kenta OGI , Kei KUMABAYASHI , Fumiya NAKANO , Yuhei ITAI
CPC classification number: H01M4/587 , H01M4/131 , H01M4/133 , H01M4/505 , H01M4/525 , H01M10/0431 , H01M10/0525 , H01G11/60
Abstract: A nonaqueous electrolyte energy storage device according to an aspect of the present invention includes: a negative electrode including a negative composite layer containing a negative active material; a positive electrode; and a nonaqueous electrolyte containing a nonaqueous solvent, in which the nonaqueous solvent contains diethyl carbonate, the negative composite layer contains a nonaqueous binder, the negative active material contains non-graphitizable carbon; and an amount of charge B [mAh/g] of the negative electrode in a full charge state satisfies the following Formula 1 when a true density of non-graphitizable carbon is A [g/cm3].
−600×A+1300≤B≤−830×A+1800 1
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