Development of Bromine Resistant Anode Catalyst for Hydrogen Oxidation and Reduction Reactions in Hydrogen Bromine Flow Batteries

Abstract

Hydrogen-bromine flow cell system is considered a highly advantageous electrical energy storage system due to its high energy capacity, high charge-discharge efficiency, and low cost. The hydrogen oxidation reaction (HOR) that takes place on the anode side of the hydrogen-bromine flow cell is generally catalyzed by high-activity (platinum) catalysts. The bromine reduction reaction (BRR) on the cathode side can be catalyzed with platinum-based high-performance catalysts to obtain high power density, while it can also be directly catalyzed by carbon structures. Bromine ions passing from the cathode to the anode side via the ion-permeable membrane poison the anode catalyst, causing a decrease in anode kinetics and thus battery performance. A new anode catalyst resistant to the bromine environment needs to be developed to eliminate this crossover problem, which significantly reduces the catalyst performance and lowers the hydrogen oxidation reaction (HOR) kinetics. This project, it is aimed to improve the kinetics of the hydrogen oxidation reaction by developing bromine resistant anode electrocatalysts with high catalytic activity. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.