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

Yonghwan Oh | Zendy; Geon-Woo Lee | Zendy; Cheol-Hwi Ryu | Zendy; GabJin Hwang | Zendy

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

Author(s) -

Yonghwan Oh,

Geon-Woo Lee,

Cheol-Hwi Ryu,

GabJin Hwang

Publication year - 2016

Publication title -

journal of hydrogen and new energy

Language(s) - English

Resource type - Journals

eISSN - 2288-7407

pISSN - 1738-7264

DOI - 10.7316/khnes.2016.27.2.169

Subject(s) - electrolyte , flow battery , vanadium , chemistry , cyclic voltammetry , inorganic chemistry , battery (electricity) , electrochemistry , redox , electrode , thermodynamics , power (physics) , physics

>> The electrolyte added the chlorosulfuric acid (HSO3Cl) 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 HSO3Cl was higher than that in the electrolyte non-added HSO3Cl. The thermal stability of the pentavalent vanadium ion solution, which was tested at 40°C, increased by adding HSO3Cl. The performances of VRFB using the electrolyte added and non-added HSO3Cl were measured during 30 cycles of charge-discharge at the current density of 60 mA/cm 2 . An average energy efficiency of the VRFB was 72.5%, 82.4%, and 81.6% for the electrolyte non-added HSO3Cl, added 0.5 mol of HSO3Cl, and added 1.0 mol of HSO3Cl, respectively. VRFB using the electrolyte added HSO3Cl was showed the higher performance than that using the electrolyte non-added HSO3Cl.

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