MLPB-PEG400/LiClO4固体聚合物电解质的电化学性能研究

摘要

采用溶液浇铸法,以聚乙二醇400(PEG400)接枝马来酸酐聚丁二烯(MLPB)为基体,高氯酸锂(LiClO4)为碱金属盐,制备了MLPB-PEG400/LiClO4固体聚合物电解质.研究了MLPB-PEG400/LiClO4电解质的电化学性能.结果表明,所制氧锂摩尔比为8的MLPB-PEG400/LiClO4固体聚合物电解质综合性能较好,其电导率变化在温度为25～90℃时符合Arrhenius方程,在温度大于100℃时趋于稳定,电化学稳定窗口达到4.5V.%MLPB-PEG400/LiC1O4 solid polymer electrolytes were prepared by solvent casting, with the maleic anhydride polybutadiene (MLPB) grafted polyethylene glycol 400 (PEG400) as matrix and LiClO4 as alkali metal salt. The electrochemical performance of the MLPB-PEG400/LiC104 electrolytes was studied. The results show that: the MLPB-PEG400/LiC1O4 electrolyte with the mole ratio of oxide to lithium equaling to 8 shows good performance; The changes in its conductivity versus temperature obey the Arrhenius equation in a range of 25 ℃ to 90 ℃, while become insignificant when the temperature is above 100 °C; Moreover, its electrochemical stability window reaches 4.5 V.