Georgia Tech Research Corporation

The Chemours Company Fc, LLC

Murat Unlu

Paul Albert Kohl

Ralph Birchard Lloyd

Hyea Kim

Timothy Edward Hopkins

Randal L Perry

Dennis J Kountz

Alan D English

Junfeng Zhou

Irene Anestis-Richard

Jack Christopher Brady

Douglas Glenn Ewart

Mark Robert Mckeever

Lam H Leung

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 &#x2014;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 &#x2014;SOX wherein X is H.

Flow battery having a separator membrane comprising an ionomer

Provided according to some embodiments of the invention are anion exchange polyelectrolytes that include an at least partially fluorinated polyaromatic polymer backbone; and at least one cationic functional group pendant therefrom. Also provided are anion exchange membranes (AEMs) formed from at least one anion exchange polyelectrolyte according to an embodiment of the invention, and fuel cells including such AEMs.

Anion exchange polyelectrolytes

A fuel cell () includes a cation exchange membrane (), a first anion exchange membrane () and a second anion exchange membrane (). The cation exchange membrane () has a first side and an opposite second side. The first anion exchange membrane () has a first exterior surface and an opposite first interior surface disposed along at least a portion to the first side of the cation exchange membrane (). A catalyst () is embedded along the first exterior surface. The second anion exchange membrane () has a second exterior surface and an opposite second interior surface disposed along at least a portion to the second side of the cation exchange membrane (). A catalyst () is embedded along the second exterior surface. A stack of fuel cells () include a first fuel cell () with an acidic first anode () that is electrically coupled to an alkaline second cathode () of a second fuel cell ().

Electrochemical devices based on multiple junction ionic conductive membranes

Growing community of inventors

Newark, DE, United States of America

Murat Unlu