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Molten Triazolium Chloride Systems as New Aluminum Battery Electrolytes

Molten Triazolium Chloride Systems as New Aluminum Battery Electrolytes The possibility of using molten mixtures of 1,4‐dimethyl‐1,2,4‐triazolium chloride (DMTC) and aluminum chloride as secondary battery electrolytes was studied, in some cases extended by the copresence of sodium chloride. mixtures demonstrated high specific conductivity in a wide temperature range. The equimolar system is most conductive and has κ values between in the range from −31 to 123°C, respectively. The electrochemical window of DMTC‐containing sodium tetrachloroaluminate melts varied in the region of 2.5 to 2.2 V (150–170°C) depending on melt acidity and anode material. DMTC, being specifically adsorbed and reduced on the tungsten electrode surface, had an inhibiting effect on the aluminum reduction, but this effect was suppressed on the aluminum substrate. An electrochemical process with high current density (tens of milliamperes per square centimeter) was observed at 0.344 V on the acidic sodium tetrachloroaluminate background, involving a free triazolium radical mechanism. Molten electrolytes are acceptable for battery performance and both the aluminum anode and the triazolium electrolyte can be used as active materials in the acidic mixtures. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Electrochemical Society IOP Publishing

Molten Triazolium Chloride Systems as New Aluminum Battery Electrolytes

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References (6)

Copyright
Copyright © 1993 ECS - The Electrochemical Society
ISSN
0013-4651
eISSN
1945-7111
DOI
10.1149/1.2220994
Publisher site
See Article on Publisher Site

Abstract

The possibility of using molten mixtures of 1,4‐dimethyl‐1,2,4‐triazolium chloride (DMTC) and aluminum chloride as secondary battery electrolytes was studied, in some cases extended by the copresence of sodium chloride. mixtures demonstrated high specific conductivity in a wide temperature range. The equimolar system is most conductive and has κ values between in the range from −31 to 123°C, respectively. The electrochemical window of DMTC‐containing sodium tetrachloroaluminate melts varied in the region of 2.5 to 2.2 V (150–170°C) depending on melt acidity and anode material. DMTC, being specifically adsorbed and reduced on the tungsten electrode surface, had an inhibiting effect on the aluminum reduction, but this effect was suppressed on the aluminum substrate. An electrochemical process with high current density (tens of milliamperes per square centimeter) was observed at 0.344 V on the acidic sodium tetrachloroaluminate background, involving a free triazolium radical mechanism. Molten electrolytes are acceptable for battery performance and both the aluminum anode and the triazolium electrolyte can be used as active materials in the acidic mixtures.

Journal

Journal of the Electrochemical Society – IOP Publishing

Published: Nov 1, 1993

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