公开(公告)号：US11710853B2

公开(公告)日：2023-07-25

申请号：US17410520

申请日：2021-08-24

Applicant: GS Yuasa International Ltd.

Inventor： Tetsuhiro Kobayashi ,  Yudai Kawasoe ,  Kenta Nagamine

IPC: H01M10/0567 ,  C07D239/26 ,  C07D239/38 ,  C07D239/52 ,  C07D239/54 ,  C07D251/24 ,  C07D251/30 ,  C07D251/38 ,  C07D251/46 ,  H01G11/06 ,  H01G11/60 ,  H01G11/62 ,  H01G11/64 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01G11/50

CPC classification number: H01M10/0567 ,  C07D239/26 ,  C07D239/38 ,  C07D239/52 ,  C07D239/54 ,  C07D251/24 ,  C07D251/30 ,  C07D251/38 ,  C07D251/46 ,  H01G11/06 ,  H01G11/60 ,  H01G11/62 ,  H01G11/64 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01G11/50 ,  H01M2300/0025

Abstract: Provided are a nonaqueous electrolyte capable of providing a nonaqueous electrolyte energy storage device with reduced direct current resistance and an increased capacity retention ratio after charge-discharge cycles, a nonaqueous electrolyte energy storage device including such a nonaqueous electrolyte, and a method for producing such a nonaqueous electrolyte energy storage device. One mode of the present invention is a nonaqueous electrolyte for an energy storage device, containing an additive represented by the following Formula (1) or Formula (2). In Formula (1), R1 to R4 are each independently a hydrogen atom or a group represented by —NRa2, —ORa, —SRa, etc., with the proviso that at least one of R1 to R4 is a group represented by —ORa, —SRa, —COORa, —CORa, —SO2Ra, or —SO3Ra. In Formula (2), R5 to R7 are each independently a hydrogen atom or a group represented by —NRb2, —ORb, or —SRb, with the proviso that at least one of R5 to R7 is a group represented by —SRb.

公开(公告)号：US12119439B2

公开(公告)日：2024-10-15

申请号：US16764212

申请日：2018-11-22

Applicant: GS Yuasa International Ltd.

Inventor： Yudai Kawasoe ,  Kenta Nagamine

IPC: H01M10/0525 ,  H01M10/0563 ,  H01M50/103

CPC classification number: H01M10/0525 ,  H01M10/0563 ,  H01M50/103 ,  H01M2220/20 ,  H01M2300/002

Abstract: One aspect of the present invention is an energy storage device including: an electrode assembly including a negative electrode and a positive electrode that are stacked on each other with a separator interposed therebetween; a nonaqueous electrolyte containing a nonaqueous solvent; and a flat outer case housing the electrode assembly and the nonaqueous electrolyte, wherein the electrode assembly is disposed in the outer case in a compressed state so that the electrode assembly is pressurized in a direction of stack, a surface pressure acting on the outer case in the direction of stack is 1 k Pa or more, the nonaqueous solvent contains a fluorinated cyclic carbonate, and the nonaqueous electrolyte has an electric conductivity at 25° C. of 0.75 S/m or more.

公开(公告)号：US11764403B2

公开(公告)日：2023-09-19

申请号：US16754784

申请日：2018-10-15

Applicant: GS Yuasa International Ltd.

Inventor： Yudai Kawasoe ,  Kenta Nagamine ,  Keisuke Anami

IPC: H01M10/0569 ,  H01M10/0525 ,  H01M10/0568 ,  H01M4/13 ,  H01M4/02

CPC classification number: H01M10/0569 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0034

Abstract: A nonaqueous electrolyte secondary battery disclosed herein includes a positive electrode plate including a positive composite layer, a negative electrode plate including a negative composite layer, and a nonaqueous electrolyte, in which the negative composite layer is composed of a facing portion facing a surface of the positive composite layer, and a non-facing portion that is on the same surface as the facing portion and does not face the surface of the positive composite layer, and the area ratio of the non-facing portion to a combined area of the facing portion and the non-facing portion of the negative composite layer is 7% or more, and the nonaqueous electrolyte contains a fluorinated carbonate and a cyclic sulfone compound.

公开(公告)号：US09853327B2

公开(公告)日：2017-12-26

申请号：US15069463

申请日：2016-03-14

Applicant: GS Yuasa International Ltd.

Inventor： Yudai Kawasoe ,  Kenta Nagamine ,  Keisuke Anami

IPC: H01M6/16 ,  H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M2220/20 ,  H01M2300/0025

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode and an electrolyte solution, wherein the negative electrode includes a negative active material layer, the electrolyte solution contains fluoroethylene carbonate, and when a content (mg) of the fluoroethylene carbonate is denoted as X and a reaction area (m2) of the negative active material layer is denoted as Y, X and Y satisfy a relation of 10≦(X/Y)≦100.