Temperature-related reaction kinetics of the vanadium(IV)/(V) redox couple in acidic solutions

IMR OpenIR

	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
	2014
Source Publication	Rsc Advances
ISSN	2046-2069
Volume	4 Issue:61 Pages:32405-32411
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.
description.department	[wang, wenjun ; 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. ; xzfan@imr.ac.cn
Keyword	Graphite Electrode Materials Flow Battery Application Electrochemical-behavior Carbon Electrodes v(Iv)/v(v) vo2+/vo2+ Mechanism Storage Cell
URL	查看原文
Language	英语
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/73425
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	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.
APA	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.
MLA	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.

Files in This Item:
There are no files associated with this item.

If you have any objections to this item, please fill out the form below and the administrator will contact you as soon as possible.
Content:
Email：	*
Institution:
Verification Code:	Refresh

Any comments and suggestions are welcomed.
Title:	*
Content:
Email：	*
Verification Code:	Refresh

中国科学院金属研究所机构知识库