中文摘要：

以PEO为基体,掺杂纳米氧化镧（nano-La_2O_3）,利用溶液浇铸的方法,制备nano-La_2O_3复合型全固态聚合物电解质（SPEs）,并且表征聚合物电解质的电化学性能和热力学性能。DSC分析表明,nano-La_2O_3有效地抑制了PEO的结晶,提高聚合物的无定型程度。SPEs电导率随着nano-La_2O_3含量增加先增加后减小,在nanoLa_2O_3含量为6%（质量分数）时,SPEs在30℃下电导率达到最大2.10×10-5S/cm,在80℃下达到2.64×10-3S/cm,并且离子电导率与温度的关系服从VTF方程。TG分析表明SPE-6的开始分解温度达到320℃,具有良好的热稳定性,表明了掺杂nano-La_2O_3的PEO基SPEs具有潜在的应用价值。

英文摘要：

Solid state electrolytes（ SPEs）,based on poly ethylene oxide（ PEO） matrix and nano- Lanthanum Oxide（ nano- La_2O_3）,are prepared by solution- casting method,and their electrochemical and thermal performances are characterized in detail. The incorporation of nano- La_2O_3,from DSC measurement,can restrict the crystalline behavior of PEO effectively,leading to the improvement in amorphous state of PEO. With increasing nano- La_2O_3 contents,the ionic conductivities of SPEs increase to a maximum value,about 2. 10 × 10-5S / cm for 30 ℃ and 2. 64 × 10-3S / cm for 80 ℃ at the nano-La_2O_3 contents of 6%,and then fall down. Meanwhile,the relationship of ionic conductivity and temperature obeys the VFT function. Furthermore,the initial decomposition temperature of PEO- 6 reaches as far as 320 ℃,showing the good thermal stability and potential application of SPEs in the lithium battery industry based on PEO matrix and nano- La_2O_3.