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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
Source PublicationInternational Journal of Electrochemical Science
ISSN1452-3981
Volume10Issue:1Pages:725-736
AbstractThe 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.
description.department[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
Keywordv(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
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73766
Collection中国科学院金属研究所
Recommended Citation
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.
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