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Optimization of the Cerium-Hydrogen Redox Flow Cell

United States Patent Application

20170338508
A1
View the Complete Application at the US Patent & Trademark Office
Lawrence Berkeley National Laboratory - Visit the Technology Transfer and Intellectual Property Management Department Website
The Ce--H.sub.2 redox flow cell is optimized using commercially-available cell materials. Cell performance is found to be sensitive to the upper charge cutoff voltage, membrane boiling pretreatment, methanesulfonic-acid concentration, (+) electrode surface area and flow pattern, and operating temperature. Performance is relatively insensitive to membrane thickness, Cerium concentration, and all features of the (-) electrode including hydrogen flow. Cell performance appears to be limited by mass transport and kinetics in the cerium (+) electrode. Maximum discharge power of 895 mW cm.sup.-2 was observed at 60.degree. C.; an energy efficiency of 90% was achieved at 50.degree. C. The Ce--H.sub.2 cell is promising for energy storage assuming one can optimize Ce reaction kinetics and electrolyte.
Tucker, Michael C. (Piedmont, CA), Weber, Adam Z. (Lafayette, CA)
The Regents of the University of California (Oakland CA)
15/ 582,225
April 28, 2017
STATEMENT OF GOVERNMENTAL SUPPORT [0002] The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 between the U.S. Department of Energy and the Regents of the University of California for the management and operation of the Lawrence Berkeley National Laboratory. The government has certain rights in this invention.