Li+ ionic diffusion in Li–Cu–O compounds

Ionic diffusion and conductivity in Li2CuO2 and LiCuO2 have been studied by complex impedance measurements. The conductivity of both samples is largely enhanced with increasing temperature and reaches 10(-2)-10(-1) S/m at around 450 K. X-ray diffraction measurements show that a small amount of CuO phase appears with increasing temperature in both samples. High electric conduction would be ascribed to a complicated mechanism containing the ionic and hole conduction. (c) 2006 Elsevier B.V. All rights reserved.