High Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy Storage

TitleHigh Performance Hydrogen/Bromine Redox Flow Battery for Grid-Scale Energy Storage
Publication TypeJournal Article
Year of Publication2012
AuthorsCho, Kyu Taek, Paul L. Ridgway, Adam Z. Weber, Sophia Haussener, Vincent S. Battaglia, and Venkat Srinivasan
JournalJournal of the Electrochemical Society
PaginationA1806 - A1815
Date Published01/2012
Keywordshydrogen/bromine, redox flow battery

The electrochemical behavior of a promising hydrogen/bromine redox flow battery is investigated for grid-scale energy-storage application with some of the best redox-flow-battery performance results to date, including a peak power of 1.4 W/cm2 and a 91% voltaic efficiency at 0.4 W/cm2 constant-power operation. The kinetics of bromine on various materials is discussed, with both rotating-disk-electrode and cell studies demonstrating that a carbon porous electrode for the bromine reaction can conduct platinum-comparable performance as long as sufficient surface area is realized. The effect of flow-cell designs and operating temperature is examined, and ohmic and mass-transfer losses are decreased by utilizing a flow-through electrode design and increasing cell temperature. Charge/discharge and discharge-rate tests also reveal that this system has highly reversible behavior and good rate capability.

Short TitleJournal of the Electrochemical Society