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Redox Flow Batteries Based on Supporting Solutions Comprising a Mixture of Acids

United States Patent Application

View the Complete Application at the US Patent & Trademark Office
Pacific Northwest National Laboratory - Visit the Technology Commercialization Program Website
Redox flow battery systems having a supporting solution that contains Cl" ions can exhibit improved performance and characteristics. Furthermore, a supporting solution having mixed SO.sub.4.sup.2- and Cl.sup.- ions can provide increased energy density and improved stability and solubility of one or more of the ionic species in the catholyte and/or anolyte. According to one example, a vanadium-based redox flow battery system is characterized by an anolyte having V.sup.2+ and V.sup.3+ in a supporting solution and a catholyte having V.sup.4+ and V.sup.5+ in a supporting solution. The supporting solution can contain Cl.sup.- ions or a mixture of SO.sub.4.sup.2- and Cl.sup.- ions.
Li, Liyu (Richland, WA), Kim, Soowhan (Richland, WA), Yang, Zhenguo (Richland, WA), Wang, Wei (Richland, WA), Zhang, Jianlu (Richland, WA), Chen, Baowei (Richland, WA), Nie, Zimin (Richland, WA), Xia, Guanguang (Pasco, WA)
13/ 338,791
December 28, 2011
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with Government support under Contract DE-AC0576RL01830 awarded by the U.S. Department of Energy. The Government has certain rights in the invention.