SODIUM INSERTION TO POTASSIUM MOLYBDENUM BRONZE

The chemical sodium insertion to K0.30MoO3 by NaI was investigated and a series of new insertion compounds, NaxK0.30MoO3 (0 less than or equal to x less than or equal to 0.43), was obtained. X-ray diffraction and X-ray photoelectron spectroscopic results showed that there were two different composition regions in respect of both electrochemical and structural properties. Thermodynamic data derived from the open-circuit potential measurements in a 1 mol.dm(-3) LiClO4 / propylene carbonate solution suggested that NaxK0.30MoO3 behaved as an ideal solid solution in a composition range of 0 less than or equal to x less than or equal to ca.0.32.