Reactions (Jul 2024)

A New Nonaqueous Flow Battery with Extended Cycling

  • Diqing Yue,
  • Weilin Zhang,
  • Ivy Zhao,
  • Xiaoting Fang,
  • Yuyue Zhao,
  • Jenny Li,
  • Feng Zhao,
  • Xiaoliang Wei

DOI
https://doi.org/10.3390/reactions5030023
Journal volume & issue
Vol. 5, no. 3
pp. 452 – 461

Abstract

Read online

Nonaqueous flow batteries hold promise given their high cell voltage and energy density, but their performance is often plagued by the crossover of redox compounds. In this study, we used permselective lithium superionic conducting (LiSICON) ceramic membranes to enable reliable long-term use of organic redox molecules in nonaqueous flow cells. With different solvents on each side, enhanced cell voltages were obtained for a flow battery using viologen-based negolyte and TEMPO-based posolyte molecules. The thermoplastic assembly of the LiSICON membrane realized leakless cell sealing, thus overcoming the mechanical brittleness challenge. As a result, stable cycling was achieved in the flow cells, which showed good capacity retention over an extended test time.

Keywords