Ionics

, Volume 19, Issue 12, pp 1915–1920

Effect of In3+ ions on the electrochemical performance of the positive electrolyte for vanadium redox flow batteries

Authors

  • Zhangxing He
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
  • Lei Chen
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
  • Yaoyi He
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
  • Chen Chen
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
  • Yifan Jiang
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
  • Zhen He
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
    • Key Laboratory of Resources Chemistry of Nonferrous Metals, Ministry of Education, School of Chemistry and Chemical EngineeringCentral South University
Original Paper

DOI: 10.1007/s11581-013-0945-7

Cite this article as:
He, Z., Chen, L., He, Y. et al. Ionics (2013) 19: 1915. doi:10.1007/s11581-013-0945-7

Abstract

Influence of In3+ ions on electrochemical performance of positive electrolyte for vanadium redox flow battery was investigated in this paper. The electrochemical activity and kinetics of V(IV)/V(V) redox couple can be enhanced by the addition of In3+ ions, and the optimal concentration of In3+ ions was found at 10 mM. At this condition, the oxidation peak current with 10 mM In3+ ions is 46.6 mA at a scan rate of 20 mV s−1, larger than that of pristine electrolyte (41.8 mA), and the standard rate constant is 6.53 × 10−5 cm s−1, 42 % larger than that of the pristine electrolyte (4.58 × 10−5 cm s−1). The cell using electrolyte with 10 mM In3+ ions was assembled, and the charge–discharge performance was evaluated, and the average energy efficiency increases by 1.9 % compared with the pristine cell. The improved electrochemical performance may be ascribed to that In3+ ions change the hydration state of vanadium ions in electrolyte and promote charge transfer process.

Keywords

AdditiveIn3+ ionsElectrochemical activityKineticsVanadium redox flow batteries

Copyright information

© Springer-Verlag Berlin Heidelberg 2013