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http://dx.doi.org/10.18770/KEPCO.2021.07.02.309

Analysis of Vanadium Ions and SOC in the Electrolytes of VRFB-ESS  

Seo, Hai-Kyung (KEPCO Research Institute, Korea Electric Power Corporation)
Park, Wonshik (KEPCO Research Institute, Korea Electric Power Corporation)
Kim, Kangsan (KEPCO Research Institute, Korea Electric Power Corporation)
Publication Information
KEPCO Journal on Electric Power and Energy / v.7, no.2, 2021 , pp. 309-316 More about this Journal
Abstract
For the detection of the state of charge in VRFB-ESS, the analyses of UV-Visible spectrometry and the measurements of potential between the anolyte and catholyte were used in parallel. This paper includes the production of 4-valant ion from VOSO4 powder, 3- and 5-valant ions from electrochemical charge of 4-valant ion and 2-valant ion from 3-valant ion. It also includes the analyses of these valance ions and unknown electrolyte at any time using UV-Visible spectrometry. Through the analyses of the valance ions in samples, the SOCs of the samples at any charge-discharge times were verified.
Keywords
Vanadium Redox Flow Battery, VRFB; State of Charge, SOC; Energy Storage System, ESS; Electrolyte; Valance of Ion; UV-Visible Spectrometry; Absorbance;
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