中文摘要：

以碳酸丙烯酯（PC）为溶剂，以纳米稀土氧化物三氧化二镧（La2O3）、二氧化铈（CeO2）、三氧化二钇（Y2O3）为无机填料，采用溶胶一凝胶法制备了不同含量PMMA—PC—LiCIO4-X％稀土氧化物的电解质薄膜．通过研究发现：添加1．3％Y20，电解质体系的电导率为7．4×104S／cm，比之前提高约3倍；SEM和XRD证实，电导率的增加主要是因为纳米粒子的加入降低了电解质体系的结晶度，增大了无定形区域，使锂离子的迁移更加顺畅；红外结果显示其结晶度的下降不是化学结构的改变；TG曲线表明添加Y2O3会使电解质体系热稳定性稍有提高，其残碳量由2．8％上升到8．9％．除此之外，添加Y2O3可以有效防止气泡的产生．

英文摘要：

Using nanosized rare earth oxides La2O3, CeO2, Y2O3 as fillers, and Propylene Carbonate （PC）as organic solvent, the composite polymer electrolyte films PMMA-PC-LiCIOa-X% was prepared by sol-gel technique. It is found that the highest ionic conductivity of 7.4×10-4 S/cm is achieved with the Y203 content of 1.3%, approximately 3 times higher than before. The increase of conductivity is due to the fact that Y2O3 nano-particles can effectively inhibit the films from crystallizing and expand the amorphous region required for the ion transport, and SEM, XRD confirm that. FTIR shows that incorporated Y2O3 does not chemically interact but a physical volume effect. The results of TG illustrate that the added Y2O3 eletrolyte film will slightly improve the thermal stability, the remaining carbon increases from 2.8% to 8.9%. In addition, it can effectively prevent formation of air bubbles.