Abstract

BUENO, Paulo R.  and  BULHOES, Luis O.S.. Structural Aspects Related to Lithium Intercalation and Ionic Dynamics: Frequency Response Analysis of (Sn_x,Ti_1-x)O₂ Based Systems. Port. Electrochim. Acta [online]. 2008, vol.26, n.5, pp.385-405. ISSN 0872-1904.

Diffusion models capable of describing the ionic diffusion inside host materials, e.g. oxides, during intercalation processes, have been reported in the literature. However, the majority of the models do not succeed in establishing a good correlation between diffusion and structural environment. What is frequently described is the influence of an addition solid state reaction. In this paper we discuss about such additional reaction and its influence on the diffusion. The responses were evaluated by means of impedance patterns analyzed in (Sn_x,Ti_1-x)O₂ binary systems whose structural disorder control provides a way to evaluate how such structural disorder influences the global diffusion.

Keywords : ionic intercalation; diffusion; impedance spectroscopy.

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