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

Donghyeon Kim, Joonhyeon Jeon

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)299-304
Number of pages6
JournalBulletin of the Korean Chemical Society
Volume37
Issue number3
DOIs
StatePublished - 1 Mar 2016

Keywords

  • Redox flow battery
  • Zinc bromine flow battery
  • Zinc perchlorate

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