公开(公告)号：US20250006891A1

公开(公告)日：2025-01-02

申请号：US18828803

申请日：2024-09-09

Applicant: GS Yuasa International Ltd.

Inventor： Shinnosuke ICHIKAWA ,  Nobuhiro NAKAJIMA ,  Takashi SHIMIZU ,  Akihito TANOI ,  Heisuke NISHIKAWA

IPC: H01M4/134 ,  H01M4/02 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0567 ,  H01M10/0569

Abstract: A negative electrode includes a negative active material layer containing a silicon-based negative active material, a rubber-based binder, and a carbon nanotube, wherein a content of the silicon-based negative active material in the negative active material layer is 68 mass % or more, a content of the rubber-based binder in the negative active material layer is 3.0 mass % or more, and a content of the carbon nanotube in the negative active material layer is 0.4×(n2+4n)/(2n+3) mass % or less where n is the number of layers of graphene forming the carbon nanotube.

公开(公告)号：US20180366773A1

公开(公告)日：2018-12-20

申请号：US16061953

申请日：2016-12-14

Applicant: GS Yuasa International Ltd.

Inventor： Daisuke ENDO ,  Takashi SHIMIZU

IPC: H01M10/0525 ,  H01M4/52 ,  H01M4/50 ,  H01M4/38 ,  H01M10/04 ,  H01M10/056

CPC classification number: H01M10/0525 ,  C01G53/006 ,  C01G53/50 ,  C01P2002/50 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2002/77 ,  C01P2002/85 ,  C01P2004/34 ,  C01P2006/11 ,  H01M4/382 ,  H01M4/50 ,  H01M4/505 ,  H01M4/52 ,  H01M4/525 ,  H01M10/0431 ,  H01M10/052 ,  H01M10/056 ,  H01M10/0566

Abstract: The positive active material for a lithium secondary battery includes a lithium transition metal composite oxide having an α-NaFeO2 structure, and having a diffraction peak at 2 θ=44±1° and a diffraction peak at 2 θ=18.6±1° in a powder X-ray diffraction diagram using a CuKα ray. In a ratio FWHM (003)/FWHM (104) of a full width at half maximum FWHM (003) for the diffraction peak at 2 θ=18.6±1° to a full width at half maximum FWHM (104) for the diffraction peak at 20 θ=44±1°, a ratio of FWHM (003)/FWHM (104) in a charge state immediately after a discharge state to FWHM (003)/FWHM (104) in the discharge state is 0.72 or more.

公开(公告)号：US20240168099A1

公开(公告)日：2024-05-23

申请号：US18551505

申请日：2022-03-09

Applicant: GS Yuasa International Ltd.

Inventor： Shinnosuke ICHIKAWA ,  Shinya MIYAZONO ,  Akihito TANOI ,  Heisuke NISHIKAWA ,  Nobuhiro NAKAJIMA ,  Takashi SHIMIZU

IPC: G01R31/3842 ,  G01R31/3828 ,  H01M4/48 ,  H01M10/42 ,  H01M10/48 ,  H01M4/02 ,  H02J7/00

CPC classification number: G01R31/3842 ,  G01R31/3828 ,  H01M4/483 ,  H01M10/425 ,  H01M10/48 ,  H01M2004/027 ,  H02J7/0048

Abstract: An estimation device is a device that estimates a charge state of an energy storage device including a negative electrode having a negative active material that contains Si. The estimation device includes a control unit that determines based on a charge-discharge history of the energy storage device whether or not to perform a first estimation method of estimating a charge state of the energy storage device by using a relationship between the charge state and a voltage of the energy storage device.

公开(公告)号：US20230102905A1

公开(公告)日：2023-03-30

申请号：US17774537

申请日：2020-06-16

Applicant: GS Yuasa International Ltd.

Inventor： Naoki INOUE ,  Fumiya KONDO ,  Takashi KANEKO ,  Takashi SHIMIZU ,  Akihito TANOI ,  Heisuke NISHIKAWA

IPC: H01M50/489 ,  H01M4/38 ,  H01M50/417 ,  H01M10/0525

Abstract: An aspect of the present invention is a nonaqueous electrolyte energy storage device including: a negative electrode including a negative active material layer with a thickness expansion rate of 10% or more due to charge; and a separator, in which the absolute value (|dR/dP|) of an increase in resistance (dR) to a change in pressure (dP) in pressurization is 0.15 Ω·cm2/MPa or less in the separator impregnated with a measurement electrolyte solution, the measurement electrolyte solution contains an ethylene carbonate and an ethyl methyl carbonate as a solvent, and a lithium hexafluorophosphate as an electrolyte salt, the volume ratio between the ethylene carbonate and the ethyl methyl carbonate is 30:70, and the concentration of the lithium hexafluorophosphate is 1.0 mol/L.