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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~(-5)S/cm,在80℃下达到2.64×10~(-3)S/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。
The nano-La 2 O 3 composite solid polymer electrolyte (SPEs) was prepared by PEO-based nano-La 2 O 3 doped with nano-La 2 O 3 and solution casting. The electrochemical and thermodynamic properties of the polymer electrolyte were also characterized. DSC analysis showed that nano-La 2 O 3 effectively inhibited the crystallization of PEO and increased the amorphous degree of the polymer. The conductivity of SPEs first increased and then decreased with the increase of nano-La 2 O 3 content. The conductivity of SPEs reached 2.10 × 10 -5 S / cm at 30 ℃ with nanoLa 2 O 3 content of 6% (mass fraction) 80 ° C to reach 2.64 × 10 -3 S / cm, and ionic conductivity and temperature obey the VTF equation. TG analysis showed that the initial decomposition temperature of SPE-6 reached 320 ℃, which has good thermal stability, indicating that PEO-based SPEs doped with nano-La 2 O 3 have potential applications.