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Communication—A new additive for increased stabilization of catholytes in vanadium flow batteries (VFBs)
Oboroceanu, Daniela; Quill, Nathan; Lenihan, Catherine; Lynch, Robert P.; Buckley, Noel
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
Keyword(s): Catholytes; Flow Batteries
Publication Date:
2019
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Funder(s): Enterprise Ireland
Citation(s): Journal of The Electrochemical Society;166 (10)pp. A2270-A2272
CF 2018 1006I
Publisher(s): Electrochemical Society
First Indexed: 2019-07-14 06:41:13 Last Updated: 2019-12-12 06:40:25