Enhancing the performance of an all-organic non-aqueous redox flow battery

The non-aqueous redox flow battery (NARFB) is a promising device for grid-scale energy storage. However, its electrochemical performance and long-term stability still need to be improved. This work shows that the electrochemical performance of NARFB can be remarkably enhanced by optimizing the supporting electrolyte and separator. The battery with 2,1,3-benzothiadiazole (BzNSN) as anolyte, 2,5-di-tert-butyl-1-methoxy-4-[2′-methoxyethoxy]benzene (DBMMB) as catholyte, tetraethylammonium bis(trifluoromethylsulfonyl)imide (TEATFSI) as supporting electrolyte, and porous Daramic 250 separator delivers an average discharge capacity of 1.7 Ah L−1, voltage efficiency of 87.8%, Coulombic efficiency of 89.1%, and energy efficiency of 78.3% over 100 cycles at the current density of 40 mA cm−2 with 0.1 M active materials. The reasons for the capacity decay over cycling in terms of electrolyte leakage, crossover, and chemical decomposition are discussed.

Keywords

Electrochemical energy storage, Non-aqueous redox flow battery, Separator, Stability, Supporting electrolyte

DOI

10.1016/j.jpowsour.2019.227283

Citation

Yuan, J, Zhang, C, Zhen, Y, Zhao, Y & Li, Y 2019, ' Enhancing the performance of an all-organic non-aqueous redox flow battery ', Journal of Power Sources, vol. 443, 227283 . https://doi.org/10.1016/j.jpowsour.2019.227283

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202105126646

Collections

[article-cris] Kemian tekniikan korkeakoulu / CHEM

Show all metadata

Enhancing the performance of an all-organic non-aqueous redox flow battery

Access rights

URL

Journal Title

Journal ISSN

Volume Title

Authors

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections