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公开(公告)号：US20240079589A1
公开(公告)日：2024-03-07
申请号：US18273917
申请日：2022-01-18
Applicant: GS Yuasa International Ltd.
Inventor： Kenta OGI , Kei KUMABAYASHI
CPC classification number: H01M4/583 , H01G11/24 , H01G11/40 , H01G11/42 , H01M4/133 , H01M4/625 , H01M2004/027
Abstract: An aspect of the present invention is an energy storage device including a negative electrode including a negative substrate and a negative active material layer layered directly or indirectly on at least one surface of the negative substrate, where the negative active material layer contains: solid graphite particles that have a median diameter D1; hollow graphite particles that have a larger median diameter D2 than the solid graphite particles; and a conductive agent, and the conductive agent is fibrous carbon.
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Patent Agency Ranking
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：US20230022950A1
公开(公告)日：2023-01-26
申请号：US17787448
申请日：2020-12-22
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Kenta OGI , Kei KUMABAYASHI , Akihiko MIYAZAKI
IPC: H01M4/133 , H01M4/587 , H01M4/505 , H01M4/525 , H01M4/131 , H01M4/62 , H01M50/491 , H01M10/0587 , H01G11/32 , H01G11/46
Abstract: An energy storage device according to one aspect of the present invention includes: a negative electrode including a negative electrode substrate and a negative active material layer layered directly or indirectly on a surface of the negative electrode substrate; and a positive electrode. The negative active material layer contains a negative active material. The negative active material contains non-graphitizable carbon. In one direction of the negative electrode substrate, at least one end edge side of the negative active material layer is thicker than a central portion present between the one end edge side and the other end edge side facing the one end edge side. When a true density of the non-graphitizable carbon is A [g/cm3], an amount of charge B [mAh/g] of the negative electrode in a fully charged state satisfies the following formula 1. −
173
XA+1588
≤
B
≤
-830A+1800-
公开(公告)号：US20210257618A1
公开(公告)日：2021-08-19
申请号：US17274668
申请日：2019-09-10
Applicant: GS Yuasa International Ltd.
Inventor： Kenta OGI , Fumiya NAKANO , Ryosuke SHIMOKAWA , Shota ITO , Masaki MASUDA , Taro YAMAFUKU , Kei KUMABAYASHI , Akihiko MIYAZAKI
IPC: H01M4/587 , H01M50/578 , H01M4/133 , H01M4/1393 , H01G11/32 , H01G11/86 , H01G11/78
Abstract: An aspect of the present invention is an energy storage device including an electrode assembly that has a negative electrode and a positive electrode, where the negative electrode contains a negative electrode substrate and a negative active material, and has a negative active material layer disposed in an unpressed shape along at least one surface of the negative electrode substrate, the negative active material includes solid graphite particles as a main component, and the solid graphite particles have an aspect ratio of 1 or more and 5 or less.
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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-
公开(公告)号：US20220271287A1
公开(公告)日：2022-08-25
申请号：US17597560
申请日：2020-07-21
Applicant: GS Yuasa International Ltd.
Inventor： Kenta OGI , Kei KUMABAYASHI , Akihiko MIYAZAKI
IPC: H01M4/587
Abstract: One aspect of the present invention is an energy storage device including a negative electrode including a negative electrode substrate and a negative active material layer stacked directly or indirectly on at least one surface of the negative electrode substrate, the negative active material layer containing a negative active material, the negative active material containing hollow graphite particles having a median diameter D1 and solid graphite particles having a median diameter D2 smaller than the median diameter of the hollow graphite particles.
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