Electron-Transfer Kinetics of V(IV)/V(V) and V(II)/V(III) Couples for Different State of Charge

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	Electron-Transfer Kinetics of V(IV)/V(V) and V(II)/V(III) Couples for Different State of Charge
	F. Y.; Chen Chen, H.; Sun, Q.; Liu, J. G.; Yan, C. W.; Liu, Q. Y.
	2015
发表期刊	International Journal of Electrochemical Science
ISSN	1452-3981
卷号	10 期号:1 页码:725-736
摘要	The electrochemical behavior of the V(IV)/V(V) and V(II)/V(III) redox couples has been studied at a graphite electrode by cyclic voltammetry in sulfuric acid solutions. The diffusion coefficient (D) and the rate constant (k) of V(IV)/V(V) and V(II)/V(III) redox couples for varying state of charge (SOC) can be calculated by cyclic voltammetry. The values of D-a(diffusion coefficient of anode) and k(a)(the rate constant of anode) are increased for V(IV)/V(V) couple while decreased for V(II)/V(III) couple with increasing of SOC. Electrochemical impedance spectroscopy (EIS) is employed to study mechanism of the two couples in sulfuric acid medium. Characteristic EIS plots with the capacitive semicircle in high frequency and the Warburg tail in low frequency are observed for the two couples, implying that both the electrochemical and diffusion process play important roles in V(IV)/V(V) and V(II)/V(III) couples, the two electrode processes are controlled by both electron-transfer and mass-transfer.
部门归属	[chen, fuyu ; sun, qing ; liu, qingyu] shenyang agr univ, coll engn, shenyang 110866, peoples r china. [chen, hui ; liu, jianguo ; yan, chuanwei] chinese acad sci, inst met res, lab corros & protect, shenyang 110016, peoples r china. ; chen, fy (reprint author), shenyang agr univ, coll engn, shenyang 110866, peoples r china. ; chenfuyu2005@163.com
关键词	v(Iv)/v(v) Couple v(Ii)/v(Iii) Couple Electron-transfer Kinetics State Of Charge Redox Flow Battery Graphite Electrode Soluble Lead(Ii) Evolution Cell
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73766
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. Y.,Chen Chen, H.,Sun, Q.,et al. Electron-Transfer Kinetics of V(IV)/V(V) and V(II)/V(III) Couples for Different State of Charge[J]. International Journal of Electrochemical Science,2015,10(1):725-736.
APA	F. Y.,Chen Chen, H.,Sun, Q.,Liu, J. G.,Yan, C. W.,&Liu, Q. Y..(2015).Electron-Transfer Kinetics of V(IV)/V(V) and V(II)/V(III) Couples for Different State of Charge.International Journal of Electrochemical Science,10(1),725-736.
MLA	F. Y.,et al."Electron-Transfer Kinetics of V(IV)/V(V) and V(II)/V(III) Couples for Different State of Charge".International Journal of Electrochemical Science 10.1(2015):725-736.