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DOI QR Code

Study on the Electrolyte Added Chlorosulfuric Acid for All-vanadium Redox Flow Battery

바나듐 레독스 흐름 전지용 전해액으로 클로로황산 첨가에 관한 연구

OH, YONG-HWAN;LEE, GEON-WOO;RYU, CHEOL-HWI;HWANG, GAB-JIN
오용환;이건우;유철휘;황갑진

  • Received : 2016.03.25
  • Accepted : 2016.04.30
  • Published : 2016.04.30

Abstract

The electrolyte added the chlorosulfuric acid ($HSO_3Cl$) as an additive was tested for the electrolyte in all-vanadium redox flow battery (VRFB) to increase the thermal stability of electrolyte. The electrolyte property was measured by the CV (cyclic voltammetry) method. The maximum value of a voltage and current density in the electrolyte added $HSO_3Cl$ was higher than that in the electrolyte non-added $HSO_3Cl$. The thermal stability of the pentavalent vanadium ion solution, which was tested at $40^{\circ}C$, increased by adding $HSO_3Cl$. The performances of VRFB using the electrolyte added and non-added $HSO_3Cl$ were measured during 30 cycles of charge-discharge at the current density of $60mA/cm^2$. An average energy efficiency of the VRFB was 72.5%, 82.4%, and 81.6% for the electrolyte non-added $HSO_3Cl$, added 0.5 mol of $HSO_3Cl$, and added 1.0 mol of $HSO_3Cl$, respectively. VRFB using the electrolyte added $HSO_3Cl$ was showed the higher performance than that using the electrolyte non-added $HSO_3Cl$.

Keywords

Secondary battery;Redox flow battery;Vanadium;Electrolyte;Energy storage

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Acknowledgement

Supported by : 한국산업기술진흥원