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.

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

IPC: H01M4/587 ,  H01M4/131 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M10/04 ,  H01M10/0525

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