Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte

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

doi:10.1149/1.1391721

Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte

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

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Abstract

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 language	English
Journal	Journal of The Electrochemical Society
Volume	146
Issue number	3
Pages (from-to)	1060-1068
ISSN	0013-4651
DOIs	https://doi.org/10.1149/1.1391721
Publication status	Published - 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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title = "Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte",

abstract = "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.",

author = "Schmidt, {Douglas S.} and Jack Winnick and Soghomon Boghosian and Rasmus Fehrmann",

note = "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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T1 - Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte

AU - Schmidt, Douglas S.

AU - Winnick, Jack

AU - Boghosian, Soghomon

AU - Fehrmann, Rasmus

N1 - 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).

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

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DO - 10.1149/1.1391721

M3 - Journal article

SN - 0013-4651

VL - 146

SP - 1060

EP - 1068

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

IS - 3

ER -

Electrochemical and spectroscopic investigations of the K2SO4-V2O5 molten electrolyte

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