Effects of operating temperature on the performance of vanadium redox flow batteries

C. Zhang, T. S. Zhao, Q. Xu, Liang An, G. Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

69 Citations (Scopus)

Abstract

For an operating flow battery system, how the battery's performance varies with ambient temperatures is of practical interest. To gain an understanding of the general thermal behavior of vanadium redox flow batteries (VRFBs), we devised and tested a laboratory-scale single VRFB by varying the operating temperature. The voltage efficiency of the VRFB is found to increase from 86.5% to 90.5% at 40mA/cm2when the operating temperature is increased from 15°C to 55°C. The peak discharge power density is also observed to increase from 259.5mW/cm2to 349.8mW/cm2at the same temperature increment. The temperature increase, however, leads to a slight decrease in the coulombic efficiency from 96.2% to 93.7% at the same temperature increments. In addition, the capacity degradation rate is found to be higher at higher temperatures.
Original languageEnglish
Pages (from-to)349-353
Number of pages5
JournalApplied Energy
Volume155
DOIs
Publication statusPublished - 1 Oct 2015
Externally publishedYes

Keywords

  • Capacity degradation
  • Coulombic efficiency
  • Operating temperature
  • Vanadium redox flow battery
  • Voltage efficiency

ASJC Scopus subject areas

  • Building and Construction
  • Energy(all)
  • Mechanical Engineering
  • Management, Monitoring, Policy and Law

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