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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 9312546 B1

PDFFull Text
Date of Patent:
Apr. 12, 2016

Filed:

Dec. 22, 2010

Stainless steel material for a separator of a solid polymer fuel cell and a solid polymer fuel cell using the separator

Applicants:

Hideya Kaminaka, Nishinomiya, JP;

Junko Imamura, Amagasaki, JP;

Yasuto Higashida, Kobe, JP;

Inventors:

Hideya Kaminaka, Nishinomiya, JP;

Junko Imamura, Amagasaki, JP;

Yasuto Higashida, Kobe, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Clark & Brody

Primary Examiner:

Ula C Ruddock

Assistant Examiner:

Amanda Barrow

Int. Cl.
CPC ...
H01M 8/24 (2006.01); H01M 2/16 (2006.01); H01M 8/10 (2006.01); H01M 8/02 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/54 (2006.01); C23C 28/00 (2006.01); C23F 17/00 (2006.01); C23C 28/04 (2006.01);
U.S. Cl.
CPC ...
H01M 8/021 (2013.01); C21D 6/002 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/54 (2013.01); C23C 28/00 (2013.01); C23C 28/042 (2013.01); C23C 28/048 (2013.01); C23F 17/00 (2013.01); H01M 8/0213 (2013.01); H01M 8/0228 (2013.01); H01M 2008/1095 (2013.01); Y02E 60/50 (2013.01);
Abstract

A stainless steel member comprising a stainless steel base metal; an oxide film located on the surface of the stainless steel base metal; an electroconductive layer located on the surface of the oxide film and comprising a nonmetallic electroconductive material; and an electroconductive material which is located so as to penetrate the oxide film and which electrically contacts the stainless steel base metal and the electroconductive layer is provided as a stainless steel member for a separator of a solid polymer fuel cell having excellent properties such that a degradation in performance is low even after prolonged operation. A solid polymer fuel cell using the stainless steel member is also provided.

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