Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte

IMR OpenIR

	Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte
	Jing, MH; Wei, ZF; Su, W; He, HX; Fan, XZ; Qin, Y; Liu, JG; Yan, CW; Fan, XZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
	2016-08-30
发表期刊	JOURNAL OF POWER SOURCES
ISSN	0378-7753
卷号	324 页码:215-223
摘要	In order to improve the utilization rate of the electrolyte and further reduce the energy storage cost, the physicochemical properties, electrochemical characteristics and charge/discharging behaviors of VFB with different concentration of VOSO4 and H2SO4 were investigated systematically. The physicochemical characterizations show that the viscosity increases with the increasing concentration of VOSO4 and H2SO4, and the conductivity increases with the increasing concentration of H2SO4 while decreases with the increasing concentration of VOSO4. Both CV and EIS results demonstrate that the electrolyte with 1.6 mol L-1 VOSO4 and 2.8 mol L-1 H2SO4 presents the best electrochemical performance because of the coupling effect of the viscosity, conductivity and electrochemical activity. Different with the half-cell electrochemical tests, the battery performance of VFB is not only dependent on the electrochemical activity of electrode/electrolyte interface, but also closely related to the conductivity of electrolyte and diffusion rates of the active particles between anolyte and catholyte. Taking the battery efficiencies and capacity into consideration, VFB with 1.6 mol VOSO4 and 2.8 mol L-1 H2SO4 exhibits the optimal electrochemical performance. The accomplishment of this work not only gives data support to the fundamental research of VFB, but also provides theoretical direction to the engineering application of VFB. (C) 2016 Elsevier B.V. All rights reserved.
部门归属	[jing, minghua ; he, hongxiang ; fan, xinzhuang ; qin, ye ; liu, jianguo ; yan, chuanwei] chinese acad sci, inst met res, shenyang 110016, peoples r china ; [wei, zengfu ; su, wei] guangdong power grid co ltd, elect power res inst, guangzhou 510080, guangdong, peoples r china
关键词	Vanadium Flow Battery Electrolyte Concentration Optimization Electrochemical Activity Battery Performance
学科领域	Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
资助者	National Basic Research Program of China [2010CB227203]; Shenyang Municipal Science and Technology plan projects [F16-205-1-19]
收录类别	sci
语种	英语
WOS记录号	WOS:000380076700026
引用统计	被引频次：42[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/76299
专题	中国科学院金属研究所
通讯作者	Fan, XZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Jing, MH,Wei, ZF,Su, W,et al. Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte[J]. JOURNAL OF POWER SOURCES,2016,324:215-223.
APA	Jing, MH.,Wei, ZF.,Su, W.,He, HX.,Fan, XZ.,...&Fan, XZ .(2016).Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte.JOURNAL OF POWER SOURCES,324,215-223.
MLA	Jing, MH,et al."Improved electrochemical performance for vanadium flow battery by optimizing the concentration of the electrolyte".JOURNAL OF POWER SOURCES 324(2016):215-223.