Preparation of High Lithium-Ion Conductive Ceramic

摘要

Lithium ionic conductive solid electrolyte discs based on NASICON-type Li_(1-x)Ga_xTi_(2-x)(PO_4)_3 (x = 0.1 - 0.9) were prepared by a wet-chemical route at 1173 - 1273K. Crystalline phase, density, and electrical conductivity of the sintered discs were systematically investigated. Single phase of LiTi_2(PO_4)_3 systems were obtained at the calcination temperatures above 773K. Maximum conductivity 7.3 × 10~(-4) S/cm at 303K and activation energy of 0.30eV were obtained for the Li_(1.25)Ga_(0.25)Ti_(1.75)(PO_4)_3 discs sintered at 1223K.