The diffusion processes which were involved in the intercalation of Na, Li and H2O between the MoO2 layers of the oxide were studied by using electrochemical and electrical techniques. Conductivities which were of the order of 10-8S/cm, and Na diffusion coefficients which were of the order of 10-10cm2/s, were found. The high Na diffusivity was attributed to motion of the Na ions along 2 distorted octahedral sites which existed between the MoO2 layers. The presence of H2O did not greatly disturb the motion of Na ions, and solvated Na ions were found to occupy octahedral sites.

S.Colson, J.M.Tarascon, L.C.Klein, F.Taulelle: Solid State Ionics, 1992, 58[1-2], 163-72