公开(公告)号：US20180294506A1

公开(公告)日：2018-10-11

申请号：US15766866

申请日：2016-09-30

Applicant: GS Yuasa International Ltd.

Inventor： Kaname NAKAJIMA ,  Heisuke NISHIKAWA ,  Shuji HITOMI

IPC: H01M10/04 ,  H01M10/0525 ,  H01M10/0561

Abstract: A nonaqueous electrolyte secondary battery includes a sulfur-containing positive electrode, a negative electrode, a nonaqueous electrolyte, and a cation exchange resin layer which is disposed between the positive electrode and the negative electrode and has a first surface having a roughness factor of 3 or more.A method for producing a nonaqueous electrolyte secondary battery includes a sulfur-containing positive electrode, a negative electrode, and a cation exchange resin layer which is interposed between the positive electrode and the negative electrode and has a first surface having a roughness factor of 3 or more.The method includes injecting a lithium polysulfide-containing positive electrode electrolyte between the positive electrode and the cation exchange resin layer, and injecting a negative electrode electrolyte between the negative electrode and the cation exchange resin layer, the negative electrode electrolyte having a lithium polysulfide concentration lower than that of the positive electrode electrolyte.

公开(公告)号：US20180287120A1

公开(公告)日：2018-10-04

申请号：US15766677

申请日：2016-09-30

Applicant: GS Yuasa International Ltd.

Inventor： Kaname NAKAJIMA ,  Heisuke NISHIKAWA ,  Shuji HITOMI

IPC: H01M2/16 ,  H01M10/0525 ,  H01M4/58 ,  H01M10/0568 ,  H01M10/058

Abstract: One aspect of the present invention provides a nonaqueous electrolyte secondary battery including a sulfur-containing positive electrode, a negative electrode, a cation exchange resin layer interposed between the positive electrode and the negative electrode, a positive electrode electrolyte, and a negative electrode electrolyte. The positive electrode electrolyte contains lithium polysulfide, and a sulfur equivalent concentration of the positive electrode electrolyte is higher than the sulfur equivalent concentration of the negative electrode electrolyte. Another aspect of the present invention provides a nonaqueous electrolyte secondary battery including a sulfur-containing positive electrode, a negative electrode, a cation exchange resin layer interposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. At least one of the positive electrode and the negative electrode includes a cation exchange resin, and a concentration of an anion contained in the nonaqueous electrolyte is 0.7 mol/l or less.

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：US20230299604A1

公开(公告)日：2023-09-21

申请号：US18018574

申请日：2021-07-21

Applicant: GS Yuasa International Ltd.

Inventor： Hiromasa MURAMATSU ,  Heisuke NISHIKAWA

IPC: H02J7/00 ,  H01M10/44

CPC classification number: H02J7/007182 ,  H01M10/44 ,  H02J7/0048

Abstract: A control device 4 includes a control unit 41 that terminates discharge of an energy storage device including a negative electrode that contains Li during charge and releases Li during discharge in a case where a capacity limit amount based on a capacity of discharge and an amount of charge is reached, or in a case where voltage reaches termination voltage larger than lower limit voltage of a voltage range in which charge and discharge can be reversibly repeated.

公开(公告)号：US20220131177A1

公开(公告)日：2022-04-28

申请号：US17517347

申请日：2021-11-02

Applicant: GS Yuasa International Ltd.

Inventor： Kaname NAKAJIMA ,  Heisuke NISHIKAWA ,  Shuji HITOMI

IPC: H01M10/04 ,  H01M10/0568 ,  H01M10/058 ,  H01M10/0567 ,  H01M4/58 ,  H01M10/052 ,  H01M50/46 ,  H01M50/409 ,  H01M50/411 ,  H01M10/0525 ,  H01M10/0561

Abstract: A nonaqueous electrolyte secondary battery includes a sulfur-containing positive electrode, a negative electrode, a nonaqueous electrolyte, and a cation exchange resin layer which is disposed between the positive electrode and the negative electrode and has a first surface having a roughness factor of 3 or more.
A method for producing a nonaqueous electrolyte secondary battery includes a sulfur-containing positive electrode, a negative electrode, and a cation exchange resin layer which is interposed between the positive electrode and the negative electrode and has a first surface having a roughness factor of 3 or more.
The method includes injecting a lithium polysulfide-containing positive electrode electrolyte between the positive electrode and the cation exchange resin layer, and injecting a negative electrode electrolyte between the negative electrode and the cation exchange resin layer, the negative electrode electrolyte having a lithium polysulfide concentration lower than that of the positive electrode electrolyte.

公开(公告)号：US20190058188A1

公开(公告)日：2019-02-21

申请号：US16168138

申请日：2018-10-23

Applicant: GS Yuasa International Ltd.

Inventor： Heisuke NISHIKAWA

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/38 ,  C01B32/05 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/1393 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/04 ,  H01M4/133

Abstract: Provided are a sulfur-carbon composite having a high discharge capacity per mass and a high sulfur utilization rate, and a nonaqueous electrolyte battery including an electrode containing the sulfur-carbon composite. In the sulfur-carbon composite, a mass loss ratio X at 500° C. in thermal mass analysis and a mass ratio Y of sulfur/(sulfur+carbon) in an observation visual field at a magnification of 1000 in SEM-EDS quantitative analysis satisfy the relationship of |X/Y−1|≤0.12, and porous carbon has a mean pore diameter of 1 to 6 nm, and a specific surface area of 2000 m2g−1 or more and 3000 m2−1 or less.

公开(公告)号：US20170317340A1

公开(公告)日：2017-11-02

申请号：US15526206

申请日：2015-11-06

Applicant: GS Yuasa International Ltd.

Inventor： Heisuke NISHIKAWA

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/364 ,  C01B32/05 ,  C01P2006/12 ,  C01P2006/16 ,  H01M4/0471 ,  H01M4/133 ,  H01M4/136 ,  H01M4/1393 ,  H01M4/1397 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/20 ,  Y02T10/7011

Abstract: A sulfur-carbon composite in which sulfur is combined with porous carbon is provided. In the sulfur-carbon composite, a mass loss ratio X at 500° C. in thermal mass analysis and a mass ratio Y of sulfur/(sulfur+carbon) in an observation visual field at a magnification of 1000 in SEM-EDS quantitative analysis satisfy the relationship of |X/Y−1|≦0.12, and porous carbon has a mean pore diameter of 1 to 6 nm, and a specific surface area of 2000 m2g−1 or more and 3000 m2g−1 or less.

公开(公告)号：US20240356043A1

公开(公告)日：2024-10-24

申请号：US18693359

申请日：2022-09-21

Applicant: GS Yuasa International Ltd.

Inventor： Yuya ITAMI ,  Hideto WATANABE ,  Hiromasa MURAMATSU ,  Heisuke NISHIKAWA

IPC: H01M4/62 ,  H01G11/26 ,  H01G11/30 ,  H01G11/52 ,  H01G11/74 ,  H01G11/86 ,  H01M4/02 ,  H01M4/134 ,  H01M10/0587

CPC classification number: H01M4/628 ,  H01G11/26 ,  H01G11/30 ,  H01G11/52 ,  H01G11/74 ,  H01G11/86 ,  H01M4/134 ,  H01M10/0587 ,  H01M2004/027

Abstract: An energy storage device according to one aspect of the present invention includes: an electrode assembly including a positive electrode, a negative electrode, and a separator; and a nonaqueous electrolyte, in which the negative electrode includes: a negative substrate; a first layer disposed directly or indirectly on the separator side of the negative substrate and containing a metal of gold, platinum, or a combination thereof; and a second layer disposed on the separator side of the first layer, containing a polymer having lithium ion conductivity and a lithium salt, and capable of regulating passage of the nonaqueous electrolyte, and the negative electrode further includes a lithium metal layer disposed between the negative substrate and the first layer.

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.