Li1.2Zr1.9Ca0.1(PO4)3, a room-temperature Li-ion solid electrolyte

Substitution of 5% of Zr by Ca in LiZr₂(PO₄)₃ transforms the structure to that of rhombohedral NASICON to give a room-temperature bulk Li-ion conductivity σ_Li ≈ 1.2 × 10^-4 S cm^-1, which is comparable to that of Li_1.3Ti_1.7Al_0.3(PO₄)3 now being used as a solid Li-ion separator in test cells of novel Li-ion batteries.

This paper was originally published in Journal of Power Sources (2011) 196, 7760-7762.