公开(公告)号：US20240055662A1

公开(公告)日：2024-02-15

申请号：US18267854

申请日：2021-12-16

Applicant: GS Yuasa International Ltd.

Inventor： Tomoya TSUCHIKAWA ,  Takashi OKAJIMA ,  Naoki UEHARA

IPC: H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/131

CPC classification number: H01M10/0567 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/131

Abstract: A nonaqueous electrolyte energy storage device according to an aspect of the present invention includes: a separator including a porous substrate layer; and a nonaqueous electrolyte, where the substrate layer has a porosity of 44% or more, and the nonaqueous electrolyte contains a cyclic disulfone compound.

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：US20210328255A1

公开(公告)日：2021-10-21

申请号：US17272955

申请日：2019-09-05

Applicant: GS Yuasa International Ltd.

Inventor： Takashi OKAJIMA

IPC: H01M10/0525 ,  H01M4/505 ,  H01M4/36

Abstract: One aspect of the present invention is a nonaqueous electrolyte energy storage device including a positive electrode containing manganese-containing positive active material particles in which aluminum is present at least on a surface, and a nonaqueous electrolyte containing a salt represented by the following formula (1). Another aspect of the present invention is a method of producing a nonaqueous electrolyte energy storage device, including producing a positive electrode containing manganese-containing positive active material particles in which aluminum is present at least on a surface, and providing a nonaqueous electrolyte containing a salt represented by the following formula (1): wherein R1 is a hydrogen atom, a halogen atom, or an organic group, Mm+ is an alkali metal cation, an alkaline earth metal cation, or an onium cation. m is an integer equivalent to the number of valence of a cation represented by Mm+. when m is 2 or more, a plurality of R1s are each independently as defined above.