A prototype of high-performance two-electron non-aqueous organic redox flow battery operated at −40 °C

Zhiming Liang, Rahul Kant Jha, Thilini Malsha Suduwella, N. Harsha Attanayake, Yangyang Wang, Wei Zhang, Chuntian Cao, Aman Preet Kaur, James Landon, Susan A. Odom

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Redox flow batteries (RFBs) which can be operated under subzero temperature are significant for applications in cold regions, however, very few RFBs have been reported for use below −20 °C. Problems with active materials, such as low solubility, poor electrochemical stability, and high viscosity are the major difficulties to overcome. Herein, we report a prototype of ultra-low temperature (−40 °C) non-aqueous RFB, using two-electron glycolated phenothiazine and viologen as posolyte and negolyte, respectively, which successfully completed 100 cycles at 15 mA cm−2. The cell which was assembled with 0.1 mol L−1 active materials exhibited a theoretical voltage of 1.9 V, an average discharge volumetric capacity of 3.2 A h L−1, and ca. 78% capacity retention over 100 cycles. Increasing the active material concentration to 0.25 mol L−1, the discharge volumetric capacity reached ca. 8.5 A h L−1. This marks for the first time a non-aqueous RFB has been long-term cycled at a high current density at ultra-low temperature.

Original languageEnglish
Pages (from-to)24685-24693
Number of pages9
JournalJournal of Materials Chemistry A
Volume10
Issue number46
DOIs
StatePublished - Oct 24 2022

Bibliographical note

Publisher Copyright:
© 2022 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

Fingerprint

Dive into the research topics of 'A prototype of high-performance two-electron non-aqueous organic redox flow battery operated at −40 °C'. Together they form a unique fingerprint.

Cite this