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One of the most promising candidates for affordable energy storage systems for electric vehicles is the zinc/bromine battery. The reversible cell voltage of 1.82 V, a theoretical specific energy of 430 Wh kg Ϫ1 , robustness, high cycle life, unlimited standby periods in the charged or discharged state, low self-discharge rates, and operation at ambient temperature explain the scientific and industrial interest in this system. [1][2][3][4] Zinc is deposited at the negative electrode and elemental bromine is formed at the positive electrode during charging of the zinc/ bromine battery Zn 2ϩ ϩ 2e Ϫ r Zn [1] 2Br Ϫ r Br 2 ϩ 2e Ϫ [2]

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