Plating and stripping of sodium from a room temperature 1,2-dimethyl-3-propylimidazolium chloride melt

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.1836991· OSTI ID:367775

Gray, G E; Winnick, J; Kohl, P A ^[1]

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1. Georgia Inst. of Tech., Atlanta, GA (United States). School of Chemical Engineering

Room temperature molten salts consisting of 1,2-dimethyl-3-propylimidazolium chloride and aluminum chloride have been examined as possible electrolytes for a room temperature design of the sodium/iron(II) chloride battery. This work examines the conditions which provide the most efficient reduction and oxidation of sodium from a sodium chloride buffered, neutral melt. Most work was performed on a tungsten substrate using cyclic voltammetry. Melts were treated with gaseous HCl using a closed electrochemical cell which allowed for quantification of the effect of HCl on the electrochemical behavior of sodium in the molten salt. The HCl threshold partial pressure was less than 1 kPa for sodium plating. This result was complicated by the slow equilibrium between gaseous HCl and that dissolved in the molten salt; the effect of HCl addition was found to last for months, demonstrating the slow equilibrium. Small amounts of water contamination were found to produce a similar effect. At elevated temperatures the melt had higher conductivity, an order of magnitude higher current densities, and higher coulombic efficiency.

• Sponsoring Organization: USDOE
• OSTI ID: 367775
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 7 Vol. 143; ISSN 0013-4651; ISSN JESOAN
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
40 CHEMISTRY
ALUMINIUM CHLORIDES
BATTERY SEPARATORS
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTROLYTES
IMIDAZOLES
IRON CHLORIDES
METAL-NONMETAL BATTERIES
MOLTEN SALTS
REDOX REACTIONS
SODIUM
SODIUM CHLORIDES