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. 15, 2020
Filed:
Dec. 17, 2013
The Chemours Company Fc, Llc, Wilmington, DE (US);
Ralph Birchard Lloyd, Fayetteville, NC (US);
Murat Unlu, Newark, DE (US);
THE CHEMOURS COMPANY FC, LLC, Wilmington, DE (US);
Abstract
The invention relates to flow batteries having improved crossover resistance to electroactive species, excellent coulombic and voltage efficiency and durability, which batteries comprise a separator membrane comprising an ionomer having a high equivalent weight, EW, to achieve these performance benefits. The ionomer has an EW of 1150 to 2000. Preferably, the ionomer is a perfluorosulfonic acid ionomer which has substantially all of the functional groups being represented by the formula —SOX wherein X is H, Li, Na, K or N(R)(R)(R)(R) and R, R, R, and Rare the same or different and are H, CHor CH. Preferably, substantially all of the functional groups are represented by the formula —SOX wherein X is H.