Transition from ideal statistics to interactions by host distortion in the intercalation thermodynamics of Li into amorphous WO3 films of varying thickness

Garcia Canadas, Jorge, Garcia-Belmonte, G., Bisquert, J., Porqueras, I. and Person, C. 2005. Transition from ideal statistics to interactions by host distortion in the intercalation thermodynamics of Li into amorphous WO3 films of varying thickness. Solid State Ionics 176 (19-22) , pp. 1701-1704. 10.1016/j.ssi.2005.04.020

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Abstract

We studied the effect of the intercalant–host interaction in homogeneous a-LixWO3 by electrochemical experiments in films of different thickness (100–400 nm) prepared by electron beam evaporation. The intercalation thermodynamics was derived from the analysis of the chemical capacitance (proportional to the derivative of the composition x with respect of the chemical potential, ∂x/∂μ). It was found that thinner films can be modeled by the ideal statistics of a dilute solution (non-interacting lattice gas), while host–guest interactions are the determining factor for the electrode performance in case of thicker films (> 200 nm).

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords:	Amorphous films; Intercalation; Thermodynamic function; Chemical capacitance; Host distortion
Publisher:	Elsevier
ISSN:	0167-2738
Last Modified:	19 Mar 2016 23:21
URI:	https://orca.cardiff.ac.uk/id/eprint/48412

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