Crystallographic and electronic properties of Li1+δMn2−δO4 spinels prepared by HT synthesis

Abstract The aim of this study was to determine an influence of lithium excess in Li 1+ δ Mn 2− δ O 4 spinels (in the 0≤ δ ≤0.32 range) on their transport and structural properties. The additional lithium atoms take Mn positions causing in the lattice parameter diminution and disappearance of the phase transition observed for the stoichiometric Li 1 Mn 2 O 4 manganese spinel. Low-temperature (230–330 K) measurements of electrical conductivity and thermoelectric power indicate rather minor influence of the excess lithium on transport properties in this system.