A carbon coating cathode for high-performance Zinc-Bromine flow Battery

Abstract

The Zinc-Bromine flow Battery (ZBB) is an attractive technology for large-scale energy storage due to its higher energy density and low cost (Kim & Jeon 2015). Electrolyte of ZBB is primarily composed of an aqueous zinc-bromide salt dissolved in distilled water. The electrolyte is stored externally in two tanks and is circulated through cell stacks constantly during the charge and discharge. During charge, the zinc-bromide salt is converted into zinc metal and elemental bromine. On discharge, the metallic zinc plated on the anode dissolves as zinc ion into the electrolyte and is available for platting again at the next charge cycle (Lai et al. 2013).