A Zn(ClO4)2 Supporting Material for Highly Reversible Zinc–Bromine Electrolytes

Bulletin of the Korean Chemical Society

Joonhyeon Jeon¹  Donghyeon Kim² 

[1] 715 Korea;Department of Energy and Advanced Material Engineering Dongguk University Seoul 100‐

关键词: Redox flow battery;    Zinc–;    bromine flow battery;    Zinc perchlorate;   

DOI  :  10.1002/bkcs.10669

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

In the case of a conventional zinc bromide electrolyte solution using zinc chloride as additive, an undesirable reaction occurs. In this reaction, complex anions form between zinc and the chloride ions during charging and discharging. To overcome this problem, this paper describes an excellent electrolyte solution using zinc perchlorate as the additive, resulting in a highly stable and reversible reaction in zinc–bromine flow cells. To show the effectiveness of the proposed solution, electrochemical analyses are carried out using cyclic voltammetry, a miniature zinc–bromine flow cell, and scanning electron microscopy. The solution is then compared with the conventional electrolyte solution using zinc chloride as the supporting material. Experimental results show that use of the zinc perchlorate additive increases the rate of zinc dissolution by improving the reaction rate of bromine in the catholyte half‐cell. Consequently, this arrangement allows a highly stable operation for improving the current efficiency of zinc–bromine flow batteries.

【 授权许可】

Unknown