Electrical conductivity and structure correlation in BIZNVOX

The structure and electrical conductivity of the fast oxide ion conducting system BIZNVOX, Bi 2 Zn x V 1- O 5.5- (0.05≤x≤0.27), were investigated using X-ray powder diffraction and ac impedance spectroscopy. There is a compositional dependence of the conductivity behaviour as a function of temperature. This behaviour was correlated with the stabilisation of various polymorphs within the system. The x = 0.10 composition was found to have one of the highest low temperature conductivities (σ 300 = 4.09× 10 -3 S cm -1 ) for any BIMEVOX compound.