一种二元醇对胶体电解液性能的影响

Effects of a diol on the properties of gel electrolyte

运用循环伏安、交流阻抗、线性扫描等方法研究了添加一种二元醇—乙二醇对纳米气相二氧化硅胶体电解液性能的影响。结果表明,1%乙二醇的添加有利于气相二氧化硅的分散,使得其最佳分散时间缩短56%。同时,乙二醇的加入还能较好提高电解液的容量,降低内阻,抑制析氢和析氧反应。扫描电子显微镜结果表明,乙二醇的添加使得凝胶结构更多孔疏松。

The effects of glycol on the properties of gel electrolytes have been investigated by means of cyclic voltammetry（CV）, electrochemical impedance spectroscopy（EIS）, linear sweep voltammetry（LSV）, and scanning electron microscopy（SEM）. The results show that adding 1 % glycol helps to improve the dispersion properties of fumed silica by a decrease in 56 % optimum dispersion time. Moreover, the resistance of the gel decreases and the capacity increases greatly with adding of glycol. Finally, adding of glycol helps to restrain the evolution of both oxygen and hydrogen. The morphology study shows that the dried gel with glycol is more uniform and porous than that of no additive.