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REDOX FLOW BATTERY WITH INCREASED-SURFACE-AREA ELECTRODE AND ASYMMETRIC ELECTROLYTE CONCENTRATION

United States Patent Application

20180019483
A1
View the Complete Application at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A flow battery having stable electrochemical performance is provided. The flow battery includes a separator disposed between a positive electrode and a negative electrode, a first flow plate to distribute a positive electrolyte to the positive electrode, and a second flow plate to distribute a negative electrolyte to the negative electrode. A material of at least one of the positive and negative electrodes is treated such that a surface area of the material when treated is greater than a surface area of the material when untreated. When the positive and negative electrolytes include vanadium ions, a concentration of vanadium in the positive electrolyte is different from a concentration of vanadium in the negative electrolyte to mitigate crossover-induced capacity fade.
Pezeshki, Alan M. (Knoxville, TN), Mench, Matthew M. (Knoxville, TN), Bridges, Craig (Knoxville, TN), Daugherty, Michael Cyrus (Oak Ridge, TN)
15/ 293,187
October 13, 2016
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] This invention was made with government support under DE-AC05-00OR22725 awarded by the Department of Energy (DOE). The U.S. Government has certain rights in this invention.