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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12658454 B1

PDFFull Text
Date of Patent:
Jun. 16, 2026

Filed:

Jun. 29, 2020

Ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, and method for manufacturing same

Applicants:

Jfe Steel Corporation, Tokyo, JP;

Toyota Jidosha Kabushiki Kaisha, Toyota, JP;

Inventors:

Takayoshi Yano, Tokyo, JP;

Shin Ishikawa, Tokyo, JP;

Akio Mitsui, Toyota, JP;

Assignees:

JFE STEEL CORPORATION, Tokyo, JP;

TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;

Attorney:

Oliff PLC

Primary Examiner:

Robert S Carrico

Int. Cl.
CPC ...
H01M 4/66 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01); C22C 38/60 (2006.01); C23C 22/50 (2006.01); C23F 1/44 (2006.01); C25F 1/06 (2006.01); C25F 3/06 (2006.01);
U.S. Cl.
CPC ...
H01M 4/669 (2013.01); C22C 38/001 (2013.01); C22C 38/004 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C22C 38/60 (2013.01); C23C 22/50 (2013.01); C23F 1/44 (2013.01); C25F 1/06 (2013.01); C25F 3/06 (2013.01);
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.

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