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Stability of Vanadium Electrolytes in the Vanadium Redox Flow Battery

Published online by Cambridge University Press:  03 April 2013

Shu-Yuan Chuang ,
Chih-Hsing Leu ,
Kan-Lin Hsueh ,
Chun-Hsing Wu ,
Hsiao-Hsuan Hsu ,
Yi-Ray Chen  and
Wen-Sheng Chang
Shu-Yuan Chuang
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China Department of Materials Engineer, Ming Chi University of Technology, Taipei 243, Taiwan, Republic of China
Chih-Hsing Leu*
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
Kan-Lin Hsueh
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
Chun-Hsing Wu
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
Hsiao-Hsuan Hsu
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
Yi-Ray Chen
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
Wen-Sheng Chang
Affiliation:
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 310, Taiwan, Republic of China
*
*Corresponding author. Fax: +886-3-5820030, E-mail address: [email protected]
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Abstract

The stability of the negative electrode electrolyte affects the efficiency and capacity of energy storage in the vanadium redox flow battery (VRFB) system. To explore the stability of vanadium electrolytes, the study prepared five types of V(II) electrolytes that were exposed to air in a fixed open area and monitored the charge state of vanadium ions over time by UV/Visible spectrophotometer. This study succeeded in preparing pure V(II) electrolytes. Five characteristics are found in the UV/Visible spectra, respectively, during the oxidation process from V(II) electrolytes to V(III) electrolytes and V(III) electrolytes to V(IV) electrolytes. The experimental results show that the oxidation rate of a solution of 1 M V(II) electrolytes to V(III) electrolytes and 1 M V(III) electrolytes to V(IV) electrolytes under an atmosphere of air is 4.79 and 0.0089 mol/h per square meter. The oxidation rates of 0.05-1 M V(II) electrolytes to V(III) electrolytes are approximately 96-538 times than that of V(III) electrolytes to V(IV) electrolytes.

Keywords

energy storageenergetic materialV
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1492: Symposium D/G – Materials for Sustainable Development—Challenges and Opportunities , 2013 , pp. 25 - 31
Copyright
Copyright © Materials Research Society 2013 

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References

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