DOI: 10.3724/SP.J.1077.2013.13428

Journal of Inorganic Materials (无机材料学报) 2014/29:2 PP.220-224

Microstructure and Ionic Conductivity of Sb-doped Li7La3Zr2O12 Ceramics

The garnet-related oxides Li7-xLa3Zr2-xSbxO12 (x = 0, 0.075) were prepared by solid-state reaction method. Crystal structure, microstructure, conductivity, and element distribution were characterized for the pure and Sb-doped Li7La3Zr2O12. Ionic conductivity of the Li7La3Zr2O12 is enhanced by Sb doping. An amorphous Li-La-Zr-Al-O thin film which is formed on the grain boundary of Sb-doped samples not only suppresses the abnormal grain growth but also eliminates the pores on the grain boundary. The ionic conductivity of Sb doped Li7-xLa3Zr2-xSbxO12 ceramic with x = 0.075 sintered at 1160℃ reaches about 3.40×10-4 S/cm.

Key words:solid electrolyte,ionic conductivity,microstructure,doping

ReleaseDate:2014-07-21 17:05:45

Funds:National Natural Science Foundation of China (51102130); Program for Key Laboratory of Inorganic Function Material and Device, Chinese Academy of Sciences (KLIFMD-2011-01)

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