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Electrochemical Properties of Li3N Dissolved in Molten LiCl at 900 K

Okabe, Toru H (2001) Electrochemical Properties of Li3N Dissolved in Molten LiCl at 900 K. In: Journal of The Electrochemical Society, 148 (5).

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Thermodynamic properties of Li3N dissolved in the molten LiCl salt at 900 K were explored using electrochemical methods. It was difficult to determine precisely the decomposition voltage of Li3N dissolved in the molten salt by cyclic voltammetry. The oxidation wave of N3– ion could not be located with high accuracy. However, the lithium activity of the Pb-Li alloy in equilibrium with the molten salt containing dissolved Li3N under nitrogen atmosphere could be measured electrochemically with high accuracy using the Li/Li + reference electrode. Under the conditions used in this study, the potential of the Li-Pb electrode is equal to the decomposition voltage of Li3N. The activity of Li3N in molten LiCl was determined for anionic fractions of N3– ranging from xN3– = 10–4 to 0.028. The nitride ion concentration in the salt was determined by chemical titration. The activity coefficient of the Li3N at high dilution was found to be very low, around 10–4. The activity coefficient increases sharply with composition and has a value of 0.25 at xN3– = 0.028. ©2001 The Electrochemical Society. All rights reserved.

Item Type: Journal Article
Publication: Journal of The Electrochemical Society
Publisher: The Electrochemical Society
Additional Information: Copyright of this article belongs to The Electrochemical Society.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 07 Dec 2011 08:43
Last Modified: 07 Dec 2011 08:43
URI: http://eprints.iisc.ac.in/id/eprint/39542

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