Preparation and electrochemical properties of perovskite CexLi0.5-xCa0.5TiO3 composites

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Cheng, J.H.^1 ; Tian, C.A.^1

Department of Chemistry and Materials Engineering, Hefei University, Hefei, Anhui

230601, China^1

关键词: Co-doped;    Cubic perovskite;    Mean size;    Perovskite structures;    Structure and morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012016/pdf
DOI  :  10.1088/1757-899X/292/1/012016

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Composites with perovskite structure based on lithium and cerium co-doped CaTiO3, CexLi0.5-xCa0.5TiO3was prepared by the sol-gel method. Phase structure and morphology of the powders were carried out by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the CexLi0.5-xCa0.5TiO3powders have cubic perovskite structures after sintered above 800 oC and the mean size of the CexLi0.5-xCa0.5TiO3powders is about 60 nm. A study of ionic conductivity by electrochemical impedance spectroscopy (EIS) implies that the conductivity of CexLi0.5-xCa0.5TiO3increases with the increasing of the contents of Ce3+dopant and reaches a maximum value of 2.1×10-4S•cm-1at x = 0.05, and then decreases for x>0.05.