LiAlSiO_4基固体氧化物锂离子导电材料的研制

Approach on LiAlSiO_4-based Solid Oxides for Li-ion Conducting Materials

以LiNO3、Al(NO3)3.9H2O和(C2H5O)4Si为原材料,通过以聚乙烯醇位聚合剂的化学合成方法制备了Li-AlSiO4基固体氧化物锂离子导电材料。材料的X射线衍射分析表明,实验获得了具有四方结构的单相材料,晶格常数为a=b=0.5170nm、c=0.6295nm。所制备的材料体现具有锂离子导电性,同时得出材料的导电性与材料体系中存在的锂离子的空位有关,适当地调整体系中锂离子缺陷可以提高材料的锂离子导电性。

LiAlSiO4-based solid oxides for Li-ion conductor are prepared by using chemical synthesis method by the polymerization of polyvinyl-alcohol （PVA） with raw materials of LiNO3, Al（NO3）3·9H2O and （C2H5O）4Si. X-ray diffraction analysis shows that tetragonal crystal with the parameters of a = b = 0.5170 nm and c = 0.6295nm have been obtained. AC impedance measurement reveals that the LiAlSiO4-based solid oxides show Li-ion conductivity, and the Li-ion conductivity is closely related to the Li-ion defects inside the oxides. The experimental results indicate that Li-ion conductivity could be improved by controlling the Li-ion defects inside the LiAlSiO4-basod solid oxides.