公开(公告)号：US20200220176A1

公开(公告)日：2020-07-09

申请号：US16632999

申请日：2018-07-24

Applicant: GS Yuasa International Ltd.

Inventor： Yuto YAMAKAWA

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/13

Abstract: One aspect of the present invention is an electrode comprising: a conductive substrate; an intermediate layer layered on a surface of the substrate and containing a conductive substance and a first binder; and an active material layer layered on a surface of the intermediate layer and containing a second binder. Each of the first binder and the second binder is an aqueous binder, or each of the first binder and the second binder is a nonaqueous solvent-based binder. The intermediate layer further contains an insulating filler.

公开(公告)号：US20240322119A1

公开(公告)日：2024-09-26

申请号：US18578125

申请日：2022-07-11

Applicant: GS Yuasa International Ltd.

Inventor： Jun OYAMA ,  Kenta NAKAI ,  Takashi KANEKO ,  Kenta UEHIRA ,  Tomonori KAKO ,  Yuto YAMAKAWA ,  Taisei SEKIGUCHI

IPC: H01M4/133 ,  H01G11/24 ,  H01G11/42 ,  H01G11/50 ,  H01M4/02 ,  H01M10/0525

CPC classification number: H01M4/133 ,  H01G11/24 ,  H01G11/42 ,  H01G11/50 ,  H01M4/02 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2220/20

Abstract: An energy storage device according to one aspect of the present invention includes: a negative electrode including a negative active material layer; and a nonaqueous electrolyte. The negative active material layer contains a negative active material. The negative active material contains natural graphite particles. The natural graphite particles have an internal porosity of 2% or less. A state of charge of the negative active material in a charged state is 0.6 or less.

公开(公告)号：US20240234708A1

公开(公告)日：2024-07-11

申请号：US18563034

申请日：2022-03-16

Applicant: GS Yuasa International Ltd.

Inventor： Yuto YAMAKAWA

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525

CPC classification number: H01M4/505 ,  H01M4/525 ,  H01M4/583 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028

Abstract: A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes a positive electrode including a lithium transition metal composite oxide containing manganese; and a negative electrode including graphite, in which a ratio of manganese to metal elements other than lithium in the lithium transition metal composite oxide is 20 mol % or less, and depth of charge of the graphite in a charged state is less than 0.54.

公开(公告)号：US20250006916A1

公开(公告)日：2025-01-02

申请号：US18711183

申请日：2022-11-16

Applicant: GS Yuasa International Ltd.

Inventor： Kenta UEHIRA ,  Yuto YAMAKAWA ,  Kenta NAKAI ,  Takashi KANEKO ,  Taisei SEKIGUCHI

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0525

Abstract: A nonaqueous electrolyte energy storage device according to one aspect of the present invention includes: a positive electrode including a lithium transition metal composite oxide containing a nickel element and a manganese element; and a negative electrode including solid graphite, the solid graphite has a porosity of 2% or less, and the content of the nickel element with respect to the transition metal element in the lithium transition metal composite oxide is 40 mol % or more.

公开(公告)号：US20250079497A1

公开(公告)日：2025-03-06

申请号：US18580488

申请日：2022-06-23

Applicant: GS Yuasa International Ltd.

Inventor： Yuto YAMAKAWA ,  Takashi OKAJIMA

IPC: H01M10/04 ,  H01G11/30 ,  H01M4/36 ,  H01M10/058

Abstract: An energy storage device according to one aspect of the present invention includes an electrode assembly in which a positive electrode and a negative electrode are stacked with a separator interposed therebetween, in which the electrode assembly is in a state where a load is applied to the electrode assembly in a stacking direction, the positive electrode contains a positive active material, tungsten, boron, sulfur, phosphorus, silicon, titanium, nitrogen, germanium, aluminum, zirconium or a different element which is a combination thereof is present on a surface of the positive active material, and a creep strain after a load of 2 MPa is held for 60 seconds at a temperature of 65° C. in the separator is 0.20 or less.

公开(公告)号：US20170229711A1

公开(公告)日：2017-08-10

申请号：US15501690

申请日：2015-08-06

Applicant: GS Yuasa International Ltd.

Inventor： Yuto YAMAKAWA ,  Hidefumi HASEGAWA ,  Yohei SHIBATA ,  Shinya UEMATSU

IPC: H01M4/62 ,  H01M4/66 ,  H01M4/505 ,  H01M4/525 ,  H01G11/28 ,  H01M10/0525

CPC classification number: H01M4/623 ,  H01G11/28 ,  H01G11/70 ,  H01M4/139 ,  H01M4/505 ,  H01M4/525 ,  H01M4/624 ,  H01M4/625 ,  H01M4/661 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A purpose of the present invention is to provide a technique for still further improving safety by increasing the resistance change ratio in a high-temperature range in a nonaqueous electrolyte energy storage device, the internal resistance of which increases with an increase in internal temperature. In a positive electrode plate for nonaqueous electrolyte energy storage device, an intermediate layer containing an electrically conducting agent and a binder is provided between a positive electrode current collector and a positive composite layer, and as the binder in the intermediate layer, one having a mass average molecular weight larger than that of a binder in the positive composite layer is used. Consequently, the resistance change ratio in a high-temperature range can be increased.