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.:
Date of Patent:
Dec. 26, 2023
Filed:
Jul. 14, 2021
Applicant:
Nanofilm Technologies International Limited, Singapore, SG;
Assignee:
Nanofilm Technologies International Limited, Singapore, SG;
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/0213 (2016.01); C23C 14/02 (2006.01); C23C 14/06 (2006.01); H01M 8/0206 (2016.01); H01M 8/021 (2016.01); H01M 8/0228 (2016.01);
U.S. Cl.
CPC ...
H01M 8/0213 (2013.01); C23C 14/025 (2013.01); C23C 14/0605 (2013.01); C23C 14/0635 (2013.01); C23C 14/0641 (2013.01); H01M 8/021 (2013.01); H01M 8/0206 (2013.01); H01M 8/0228 (2013.01);
Abstract
A bipolar plate for a PEM hydrogen fuel cell is coated with a carbon-containing coating, the carbon-containing coating comprising in order: a) a titanium seed layer; b) a titanium nitride interfacial layer; and c) a a-C top layer, and wherein the bipolar plate is formed from stainless steel. Methods for making such coated plates are described. The a-C has a density of greater than 2.0 g/cm3, a molar hydrogen content of 5% or less, an sp2 carbon content of 40% to 80% and an sp3 carbon content of 20% to 60%. The coated plates possess good electrical conductivity and are resistant to corrosion.