Glasses with good Li-ion conductivity were prepared. The SiO2/P2O5 ratio was maintained equal to 1/5 and it was found that, at temperatures below 1200C, this led to a Li2O/P2O5 ratio of about 2 for the glasses which were formed. The glasses appeared to be composed of linear chains of phosphate polymers. The highest ionic conductivity was observed for LiCl-0.48Li2O-0.03SiO2-0.24P2O5, and was described by a value of 0.0025S/cm at 235C and an activation energy of 0.54eV. The conductivity increased, and the activation energy and glass transition temperature decreased, with increasing LiCl content.

P.P.Tsai, M.Greenblatt: Journal of Non-Crystalline Solids, 1988, 103[1], 101-7