公开(公告)号：US20220263095A1

公开(公告)日：2022-08-18

申请号：US17624568

申请日：2020-06-29

Applicant: JFE STEEL CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takayoshi YANO ,  Shin ISHIKAWA ,  Akio MITSUI

IPC: H01M4/66 ,  C22C38/18 ,  C23F1/44 ,  C25F1/06

Abstract: Provided is a ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, which has excellent sulfidation resistance and adhesiveness. The ferritic stainless steel sheet has a component composition containing Cr in an amount of 16% by mass or more, wherein the surface of the ferritic stainless steel sheet has an uneven structure having recessed portions and projecting portions, the average height of the projecting portions is 20 to 50 nm inclusive, the average distance between the projecting portions is 20 to 200 nm inclusive, and the [Cr]/[Fe], i.e., the ratio of the atom concentration of Cr that is present in a form other than the metal form to the atom concentration of Fe that is present in a form other than the metal form, on the surface of the ferritic stainless steel sheet is 1.0 or more.

公开(公告)号：US20230207777A1

公开(公告)日：2023-06-29

申请号：US17963240

申请日：2022-10-11

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  PANASONIC HOLDINGS CORPORATION

Inventor： Akio MITSUI ,  Aiko NAGANO ,  Yasunari SUGITA ,  Takaaki TAMURA ,  Yasutaka TSUTSUI

IPC: H01M4/131 ,  H01M10/0585 ,  H01M4/485 ,  H01M4/62 ,  H01M4/1391 ,  H01M10/0562

CPC classification number: H01M4/131 ,  H01M10/0585 ,  H01M4/485 ,  H01M4/622 ,  H01M4/1391 ,  H01M10/0562 ,  H01M2004/027

Abstract: A negative electrode layer that is used for an all-solid-state battery includes: lithium titanate; a sulfide solid electrolyte; and a rubber binder. The ratio of the amount A of the rubber binder adsorbed on the lithium titanate to the total content B of the rubber binder in the negative electrode layer is 1.35% or less.

公开(公告)号：US20240136498A1

公开(公告)日：2024-04-25

申请号：US18482389

申请日：2023-10-05

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  PANASONIC HOLDINGS CORPORATION

Inventor： Akio MITSUI ,  Kazuhiro MORIOKA ,  Koichi HIRANO

IPC: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58

CPC classification number: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M2004/021

Abstract: An all-solid-state battery has a positive electrode layer, a separator layer and a negative electrode layer. The all-solid-state battery satisfies relationships of “Formula (1): 0.99≤Sa0/Sc0≤1.01,” “Formula (2): 1.00≤Sa1/Sa0≤1.13,” and “Formula (3): 0.93≤Sc1/Sc0≤1.02.” Sc0 indicates an area of the positive electrode layer when the SOC is 0%. Sc1 indicates an area of the positive electrode layer when the SOC is 100%. Sa0 indicates an area of the negative electrode layer when the SOC is 0%. Sa1 indicates an area of the negative electrode layer when the SOC is 100%.

公开(公告)号：US20240234680A9

公开(公告)日：2024-07-11

申请号：US18482389

申请日：2023-10-06

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  PANASONIC HOLDINGS CORPORATION

Inventor： Akio MITSUI ,  Kazuhiro MORIOKA ,  Koichi HIRANO

IPC: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/58

CPC classification number: H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M2004/021

Abstract: An all-solid-state battery has a positive electrode layer, a separator layer and a negative electrode layer. The all-solid-state battery satisfies relationships of “Formula (1): 0.99≤Sa0/Sc0≤1.01,” “Formula (2): 1.00≤Sa1/Sa0≤1.13,” and “Formula (3): 0.93≤Sc1/Sc0≤1.02.” Sc0 indicates an area of the positive electrode layer when the SOC is 0%. Sc1 indicates an area of the positive electrode layer when the SOC is 100%. Sa0 indicates an area of the negative electrode layer when the SOC is 0%. Sa1 indicates an area of the negative electrode layer when the SOC is 100%.

公开(公告)号：US20230231122A1

公开(公告)日：2023-07-20

申请号：US17976456

申请日：2022-10-28

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Akio MITSUI ,  Yasunari SUGITA ,  Kenji NAGAO ,  Izuru SASAKI ,  Yasutaka TSUTSUI ,  Takaaki TAMURA ,  Hiroki KAMITAKE

IPC: H01M4/485 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0562

CPC classification number: H01M4/485 ,  H01M4/48 ,  H01M4/386 ,  H01M4/587 ,  H01M4/622 ,  H01M4/623 ,  H01M10/0562 ,  H01M10/0525

Abstract: There is provided an electrode layer for an all-solid state battery, which contains an electrode active material and a sulfide solid electrolyte, where the sulfide solid electrolyte has an average particle diameter of less than 1 µm and the electrode layer contains an imidazoline-based dispersion material.

公开(公告)号：US20250007008A1

公开(公告)日：2025-01-02

申请号：US18748705

申请日：2024-06-20

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Panasonic Holdings Corporation

Inventor： Akio MITSUI ,  Hiroo NOZAKI ,  Kenji NAGAO

IPC: H01M10/42 ,  H01M10/0562

Abstract: An electrode for a solid-state battery includes a sulfide solid electrolyte, and a metal that reacts with the sulfide solid electrolyte to exhibit electron conductivity. The content of the metal, with respect to the total volume of the electrode for a solid-state battery, is greater than or equal to 5 ppm by volume and less than 10,000 ppm by volume.

公开(公告)号：US20240170638A1

公开(公告)日：2024-05-23

申请号：US18512677

申请日：2023-11-17

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Panasonic Holdings Corporation

Inventor： Akio MITSUI ,  Kenji NAGAO ,  Izuru SASAKI

IPC: H01M4/04 ,  H01M10/0525 ,  H01M10/0562

CPC classification number: H01M4/0447 ,  H01M10/0525 ,  H01M10/0562 ,  H01M2300/0068

Abstract: A method of manufacturing a solid-state battery, the method including: over-discharging the solid-state battery having a solid sulfide electrolyte layer.

公开(公告)号：US20230253558A1

公开(公告)日：2023-08-10

申请号：US18163924

申请日：2023-02-03

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Panasonic Holdings Corporation ,  UBE Corporation

Inventor： Akio MITSUI ,  Yasunari SUGITA ,  Takaaki TAMURA ,  Shinichirou OOTANI

IPC: H01M4/485 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0585

CPC classification number: H01M4/485 ,  H01M4/62 ,  H01M10/0562 ,  H01M10/0585 ,  H01M2004/027

Abstract: There is provided a negative electrode layer that is used in an all-solid state battery, containing lithium titanate and a sulfide solid electrolyte, in which a moisture amount contained in the lithium titanate is 25 ppm or more and 547 ppm or less.

公开(公告)号：US20230231136A1

公开(公告)日：2023-07-20

申请号：US17979092

申请日：2022-11-02

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA ,  Panasonic Holdings Corporation

Inventor： Akio MITSUI ,  Yasunari SUGITA ,  Yasutaka TSUTSUI

IPC: H01M4/62 ,  H01M10/0525 ,  H01M10/0585 ,  H01M10/0562

CPC classification number: H01M4/62 ,  H01M10/0525 ,  H01M10/0562 ,  H01M10/0585 ,  H01M2220/20 ,  H01M2300/0068

Abstract: An electrode layer for an all-solid state battery contains an electrode active material, a sulfide solid electrolyte, and a residual liquid, where the residual liquid has a δP of less than 2.9 MPa½ in a Hansen solubility parameter and a boiling point of 190° C. or higher.

公开(公告)号：US20220243309A1

公开(公告)日：2022-08-04

申请号：US17623807

申请日：2020-06-29

Applicant: JFE STEEL CORPORATION ,  TOYOTA MOTOR CORPORATION

Inventor： Takayoshi YANO ,  Shin ISHIKAWA ,  Akio MITSUI

IPC: C22C38/40 ,  H01M4/66 ,  C22C38/06 ,  C22C38/00 ,  C21D8/02 ,  C22C38/04 ,  C22C38/02 ,  H01M10/36

Abstract: A ferritic stainless steel sheet for collectors of sulfide-based solid-state batteries has excellent sulfurization resistance. This ferritic stainless steel sheet has a component composition which contains, in mass %, from 0.001% to 0.050% of C, from 0.01% to 2.00% of Si, from 0.01% to 1.00% of Mn, 0.050% or less of P, 0.010% or less of S, from 18.00% to 32.00% of Cr, from 0.01% to 4.00% of Ni, from 0.001% to 0.150% of Al and 0.050% or less of N, with the balance being made up of Fe and unavoidable impurities.