2008 Volume 33 Issue 4 Pages 973-976
Li3+xIn1-xMxBr6 (M=Zn, Co, Fe) was synthesized by nano-grinding. No peak of source materials was observed for all the compounds in XRD measurements. With an increase of x for M=Fe compounds, the lattice constants decreased, because the ionic radius of Fe2+ ion are much smaller than that of In3+ ion. In the high temperature phase for Li3+xIn1-xMxBr6 (M=Zn, Co), the conductivity decreased with x. In Zn compound, a new phase transition was observed at about 345 K and the conductivity became higher than that of the medium temperature phase. In Li3+xIn1-xFexBr6, the conductivity of high temperature phase was almost equal to that for Li3InBr6. In 7Li NMR measurement, the spectra in high temperature phase for Li3+xIn1-xFexBr6 was narrowed to be less than 1 kHz. It is indicated that Li+ ion diffuse fast in the crystal and these compounds are good Li ion conductors.
