Abstract
The pyrochlore tungstate thin film has been prepared by an autoclave hydrothermal method at a temperature of 200 °C. The film was characterized by X-ray diffractometry, X-ray photoelectron spectroscopy and scanning electron micrograph measurements, showing that pure pyrochlore phase of sodium tungstate containing a small amount of water was formed by heating the film at a temperature of 350 °C. The cyclic voltammetric and galvanostic measurements revealed that a reversible electrochemical lithium intercalation into the crystal lattice of pyrochlore tungstate film takes place with charge-discharge cycling. Furthermore, the thermodynamics and kinetics of electrochemical lithium intercalation into the pyrochlore sodium tungstate film were also studied.
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