|Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions|
|W. J. Wang; X. Z. Fan; J. G. Liu; C. W. Yan; C. L. Zeng
|Source Publication||Rsc Advances
|Abstract||The temperature-related reaction kinetics of the VO2+/VO2+ redox couple on a graphite electrode in sulfuric acid solutions has been investigated by cyclic voltammetry and chronopotentiometry for a better understanding of positive half-cell in a practical vanadium redox flow battery (VRFB). Elevated temperature facilitates the VO2+/ VO2+ redox reaction but without significant effect on its reversibility, and the reaction rate constants are calculated to be in the order of 10(-3) cm s(-1). In addition, the diffusion coefficient of both VO2+ and VO2+ ions tends to increase with increasing temperature with a diffusion activation energy of 4.24 kJ mol(-1) for VO2+ and 25.2 kJ mol(-1) for VO2 (+). On this basis, two diffusion equations for both VO2+ and VO2+ ions in sulfuric acid solutions have been established.|
; fan, xinzhuang
; liu, jianguo
; yan, chuanwei
; zeng, chaoliu] chinese acad sci, inst met res, shenyang 110016, peoples r china.
; fan, xz (reprint author), chinese acad sci, inst met res, 62 wencui rd, shenyang 110016, peoples r china.
|Keyword||Graphite Electrode Materials
Flow Battery Application
W. J. Wang,X. Z. Fan,J. G. Liu,et al. Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions[J]. Rsc Advances,2014,4(61):32405-32411.
W. J. Wang,X. Z. Fan,J. G. Liu,C. W. Yan,&C. L. Zeng.(2014).Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions.Rsc Advances,4(61),32405-32411.
W. J. Wang,et al."Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions".Rsc Advances 4.61(2014):32405-32411.
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