Applications of N-methyl-N-butyl-pyrrolidinium bromide and N-methyl-N-ethyl-pyrrolidinium bromide in Zn-Br Flow Batteries

Authors

ZHANG Qi, Qinghai ZBEST New Energy Co.,Ltd, Haidong810600, Qinghai, China;
Miao-miao ZHANG, Qinghai ZBEST New Energy Co.,Ltd, Haidong810600, Qinghai, China;
MENG Lin, Qinghai ZBEST New Energy Co.,Ltd, Haidong810600, Qinghai, China;Follow

Corresponding Author

MENG Lin(lmeng@zbestpower.com)

Abstract

It is extremely important for battery performance and safety in Zn-Br flow battery to use quaternary ammonium salts as complex agents for bromine. In this work, the effects of electrolyte compositions and concentrations on the electrode reactions and battery performances were studied in the absence and presences of N-methyl-N-ethyl-pyrrolidinium bromide (MEP) or N-methyl-N-butyl-pyrrolidinium bromide (MBP). The conductivities in the electrolytes containing different constitutions and concentrations were measured by EIS method. The charge-discharge performance for the battery and the complex ability for bromine in different electrolytes were also investigated. The results showed that the electrolyte containing MBP was better than that containing MEP for the battery performance and bromine complex ability.

Graphical Abstract

Keywords

quaternary ammonium salt, MEP；MBP, Zn-Br flow batteries, bromine complex

DOI Link

https://doi.org/10.13208/j.electrochem.161027

Publication Date

2017-12-28

Online Available Date

2017-04-15

Revised Date

2017-04-13

Received Date

2016-10-27

Recommended Citation

ZHANG Qi, Miao-miao ZHANG, MENG Lin. Applications of N-methyl-N-butyl-pyrrolidinium bromide and N-methyl-N-ethyl-pyrrolidinium bromide in Zn-Br Flow Batteries[J]. Journal of Electrochemistry, 2017 , 23(6): 694-701.
DOI: 10.13208/j.electrochem.161027
Available at: https://jelectrochem.xmu.edu.cn/journal/vol23/iss6/7