Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte

Douglas S. Schmidt, Jack Winnick, Soghomon Boghosian, Rasmus Fehrmann

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    A 60 mol % K(2)SO(4)J/40 mol % V2O5 molten salt mixture was tested for electrochemical activity to determine its propensity for sulfate transport. Results of cyclic voltammetry showed a high electrochemical activity due likely to the reduction and oxidation of bulk, as opposed to minor, species. Most reductions and oxidations did not conform to diffusion-limited theory, and indicated the presence of shipping reactions. By Raman spectroscopy V(V) polymers were identified in the melt consisting predominantly of VO2(SO4)(3)(2-) and VO3- units, while VO2SO4- units were also detected. By reduction of the eutectic mixture with SO2 a V(IV) and a V(III) compound, most probably K-4(VO)(3)(SO4)(5) and K3V(SO4)(3) were isolated, as evidenced from infrared and electron spin resonance spectroscopy. These compounds might be involved in the electrochemically observed plating and stripping reactions. (C) 1999 The Electrochemical Society. S0013-4651(98)01-004-0. All rights reserved.
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Issue number3
    Pages (from-to)1060-1068
    Publication statusPublished - 1999

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    Copyright The Electrochemical Society, Inc. [1999]. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS).

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