胶体电解质性能研究及在铅蓄电池中的应用

Investigation on the electric performance of gelled electrolyte and its application in lead-acid batteries

简述了胶体电解质的配制方法;提出好的胶体电解质应具备电导率高、强度合适、凝胶时间长、微观状态颗粒较小、网络结构致密等特征;主要探讨了二氧化硅及硫酸含量、温度等因素对胶体电解质物化性能的影响;研究了不同配方胶体电解质应用于铅蓄电池时的电性能。结果表明:胶体电导率受二氧化硅含量的影响很小;胶体强度主要受二氧化硅含量控制;随着二氧化硅含量增加,凝胶时间大大缩短且凝胶时间与温度遵循阿累尼乌斯公式;当然,从电镜扫描结果来看,二氧化硅含量为6.0%左右时其胶体的微观结构较佳;不同配方的胶体电解质应用于铅蓄电池时其内阻、初始容量、大电流放电性能等方面存在差别。

The method of preparation of gel exectrolyte is described in this paper. It indicates that excellent gel electrolyte should have high conductivity, suitable intensity, long gelling time and good microstructure. The factors influencing gel electrolyte performance such as the content of silica and sulfuric acid and the temperature are mainly discussed. The electrochemical performance of the batteries made from different formula of gel electrolyte are also studied. The results of the experiment indicate that the conductivity of the gel electrolyte is less influenced by the content of SiO2, while the gel intensity depends on the SiO2 content. With the increase in content of SiO2 the gelling time shortens sharply and it follows the Arrelius equation. The result of SEM shows that the SiO2 content maintaining 6.0% has a better microstructure.