Effects of KSCN on Kinetic Characters of the Positive Couple and Performance for Vanadium Redox Flow Battery

Authors

Jian-guo LIU, State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Shenyang 110016,China;
Dong SHI, State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Shenyang 110016,China;College of Science,Northeast University,Shenyang 110004,China;
Yue MEN, College of Science,Northeast University,Shenyang 110004,China;
Chuan-wei YAN, State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Shenyang 110016,China;

Abstract

In order to improve the reaction activity of VO2+/VO2+ and the battery performance of Vanadium redox flow battery,different concentration of potassium sulfocyanates KSCN were added into 0.1mol/L VOSO4/ H2SO4 solution,and the kinetic characters of electrochemical reaction of VO2+/VO2+ was studied by CV and EIS.The results showed that the addition of KSCN could improve the oxidative peak current value of positive couple VO2+/VO2+ reaction,but had little influence in the reductive peak.The addition of KSCN decreased the impedance at 1.0 V.And the value of standard rate constant k0 was also improved with the concentration of KSCN increased.The total coulomb during the charge and discharge processes increased after the addition of KSCN,which means that the usage efficiency of active species in the VRB solution was improved.

Keywords

vanadium-redox flow battery, positive couple, dynamic characters, KSCN, battery performance

DOI Link

https://doi.org/10.61558/2993-074X.1981

Publication Date

2009-05-28

Online Available Date

2009-05-28

Revised Date

2009-05-28

Received Date

2009-05-28

Recommended Citation

Jian-guo LIU, Dong SHI, Yue MEN, Chuan-wei YAN. Effects of KSCN on Kinetic Characters of the Positive Couple and Performance for Vanadium Redox Flow Battery[J]. Journal of Electrochemistry, 2009 , 15(2): 206-211.
DOI: 10.61558/2993-074X.1981
Available at: https://jelectrochem.xmu.edu.cn/journal/vol15/iss2/16

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