Electrochemical properties of Li3 N  dissolved in molten LiCl at 900 K

Okabe, Toru H. ; Horiuchi, Akiyoshi ; Jacob, Kallaracke T. ; Waseda, Yoshio (2001) Electrochemical properties of Li3 N  dissolved in molten LiCl at 900 K Journal of the Electrochemical Society, 148 (5). E219-E226. ISSN 0013-4651

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Official URL: http://jes.ecsdl.org/content/148/5/E219.short

Related URL: http://dx.doi.org/10.1149/1.1365145

Abstract

Thermodynamic properties of Li3 N dissolved in the molten LiCl salt at 900 K were explored using electrochemical methods. It was difficult to determine precisely the decomposition voltage of Li3 N 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 Li3 N 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 Li3 N The activity of Li3 N in molten LiCl was determined for anionic fractions of N3- ranging from χN3-=10-4 to 0.028. The nitride ion concentration in the salt was determined by chemical titration. The activity coefficient of the Li3 N 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 χN3-=0.028.

Item Type:Article
Source:Copyright of this article belongs to The Electrochemical Society.
Keywords:Thermodynamic Properties; Electrochemistry; Lithium Compounds; Dissociation; Voltammetry (Chemical Analysis)
ID Code:95018
Deposited On:11 Oct 2012 06:47
Last Modified:11 Oct 2012 06:47

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