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Redox flow batteries based on supporting solutions containing chloride

United States Patent

July 7, 2015
View the Complete Patent 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.sup.- 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 (Seoul, KR), Yang; Zhenguo (Bellevue, WA), Wang; Wei (Kennewick, WA), Nie; Zimin (Richland, WA), Chen; Baowei (Richland, WA), Zhang; Jianlu (Dalian, CN), Xia; Guanguang (Richland, WA)
Battelle Memorial Institute (Richland, WA)
14/ 261,262
April 24, 2014
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 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.