【摘要】 以介孔分子筛SBA-15为造孔剂和填料,研究出一种无需使用增塑剂制备复合微孔型聚合物电解质(SBA-15CMPE)的新方法.组装Li/SBA-15CMPE/Li对称电池,并利用电化学阻抗谱(EIS)技术研究了存放时间、循环伏安(CV)扫描、恒电流极化以及环境温度等对Li/SBA-15CMPE界面性质的影响.通过将成膜浆料直接浇铸在用水性粘合剂制备的中间相微球碳(MCMB)电极片上,制备附有SBA-15CMPE的一体化电极(MCMB/SBA-15CMPE).用该MCMB/SBA-15CMPE所组装的三电极模拟电池具有良好的循环性能,EIS研究揭示了其首次阴极极化过程中碳电极上SEI膜的形成、生长和稳定的过程.更多还原

【Abstract】 In this paper,a novel composite microporous polymer electrolyte that is made of poly(vinylidene fluoride-co-hexafluoropropylene)(PVdF-HFP)and mesoporous SBA-15 was prepared(designated as SBA-15 CMPE).Electrochemical impedance spectroscopy(EIS)was applied to investigate the effects of the storage time,cyclic voltammetry(CV)measurement,constant current polarization and ambient temperature on the Li/SBA-15 CMPE interface properties.The polymer film composite integrative electrode(designated as MCMB/SBA-15 CMPE)was prepared through a process that the membrane solution was cast directly on the mesocarbon microbead(MCMB)electrode with water-solubility bond.The result of CV shows that the model cell with three-electrode based on the MCMB/SBA-15 CMPE displayed a good cyclical performance.The EIS result reveals the process of formation,growth and stabilization of solid electrolyte interphase(SEI)film on MCMB/SBA-15 CMPE electrode during the first cathodic polarization.更多还原