Preparation of LixCa1−xTiO3 solid electrolytes by the sol–gel method

Solid electrolytes based on lithium doped CaTiO3,LixCa1−xTiO3 ( x = 0 – 0.5 ) were prepared by the sol–gel method in an ethanol and water mixture medium. Phase identification and morphology observation of the products were carried out by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the LixCa1−xTiO3 powders sintered above 700 ∘C are of cubic perovskite structure and the mean size of LixCa1−xTiO3 powders is about 80 nm. A study of ionic conductivity by AC impedance implies that the conductivity of LixCa1−xTiO3 increases with the increase of substituted Li+ ions and reaches a maximum value of 4.53×10−4 S cm−1 at x = 0.1 , and then decreases for x > 0.1 .