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Communication—A new additive for increased stabilization of catholytes in vanadium flow batteries (VFBs)

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journal contribution
posted on 2019-07-12, 10:50 authored by Daniela Oboroceanu, Nathan Quill, Catherine Lenihan, Robert P. Lynch, Noel Buckley
We report a newadditive,monobasic potassium arsenate (KH2AsO4), for improving the thermal stability of VFB catholytes.Using our standard accelerated testing methodology at 30–70°C, we showed that the effect increases continuously with increasing concentration of arsenate over the range investigated (0 – 0.10 mol dm−3). In comparison to similar experiments with phosphate (H3PO4), the magnitude of the effect was greater for arsenate. A combination of arsenate and phosphate was also effective. Based on these results, we speculate that other Group-V elements in the +5 oxidation state may also stabilize VFB catholytes

History

Publication

Journal of The Electrochemical Society;166 (10)pp. A2270-A2272

Publisher

Electrochemical Society

Note

peer-reviewed

Other Funding information

European Regional Development Fund, EI

Language

English

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