Mechanism study of Li+ insertion into titania nanotubes

Abstract

Li⁺ insertion into anatase titania nanotubes (TiO₂nts) employing PEO-based polymer electrolyte has been studied by cyclic voltammetry and chronoamperometry. The study shows that Li⁺ storage in the anatase is dominated by the bulk diffusion (into the lattice) and the increasing contribution of the pseudo-capacitive effect with faster kinetics. We also report that the chemical diffusion of Li⁺ in self-organized TiO₂nts is around 2 × 10⁻¹⁶ cm² s⁻¹ suggesting that the use of a solid electrolyte does not alter the charge transport in the nanostructured electrode.