Ion solvation in lithium battery electrolyte solutions Part II. Solvent effects on lithium-ion intercalation in niobium triselenide

Atkins, P., Hefter, G.T. and Singh, P. (1991) Ion solvation in lithium battery electrolyte solutions Part II. Solvent effects on lithium-ion intercalation in niobium triselenide. Journal of Power Sources, 36 (1). pp. 17-25.

Abstract

Solvent effects on the intercalation of lithium ions in niobium triselenide electrodes have been investigated by cathodic polarization measurements in propylene carbonate (PC), acetonitrile (AN), 1,2-dimethoxyethane (DME), tetrahydrofuran (THF) and their 50% vol./vol. mixtures with PC, using 1 M LiClO4 as the supporting electrolyte. The polarization follows the general order PC≈PC/AN≈PC/THF>THF>PC/DME>DME>AN which reflects the probable size of the solvated lithium ion. This suggests that intercalation of Li+ into the host lattice occurs without desolvation. Lattice diffusion coefficients of Li+ in NbSe3 in the various solvents have been determined by an intermittent galvanostatic technique and found to be in the order AN>DME≈PC/DME>PC/AN>PC. This has also been explained in terms of solvation effects and the composition of the resultant Li+ solvation shell.

Item Type:	Journal Article
Murdoch Affiliation(s):	School of Mathematical and Physical Sciences
Publisher:	Elsevier BV
Copyright:	(c) Elsevier
URI:	http://researchrepository.murdoch.edu.au/id/eprint/1552

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