|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.
|Source Publication||JOURNAL OF POWER SOURCES
|Abstract||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.|
; 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
|Keyword||Vanadium Flow Battery
|Subject Area||Chemistry, Physical
; Energy & Fuels
; Materials Science, Multidisciplinary
|Funding Organization||National Basic Research Program of China [2010CB227203]; Shenyang Municipal Science and Technology plan projects [F16-205-1-19]
|Corresponding Author||Fan, XZ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.|
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.
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.
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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