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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
Source PublicationJOURNAL OF POWER SOURCES
ISSN0378-7753
Volume324Pages:215-223
AbstractIn 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.
description.department[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
KeywordVanadium Flow Battery Electrolyte Concentration Optimization Electrochemical Activity Battery Performance
Subject AreaChemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary
Funding OrganizationNational Basic Research Program of China [2010CB227203]; Shenyang Municipal Science and Technology plan projects [F16-205-1-19]
Indexed Bysci
Language英语
WOS IDWOS:000380076700026
Citation statistics
Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/76299
Collection中国科学院金属研究所
Corresponding AuthorFan, XZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
Recommended Citation
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.
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