凝胶铅酸蓄电池的内阻研究

通过对文献关于凝胶电池内阻观点的分析,设计了吸附、电导和循环伏安实验来揭示气相二氧化硅加入硫酸溶液中形成凝胶后的离子状况,结果表明气相二氧化硅的添加和形成凝胶有利于其中离子的传输,最大促进效应出现在5%~6%(质量分数)气相二氧化硅处。气相二氧化硅对硫酸的吸附量很小,对电池来说可以不考虑这种吸附的影响。这些结论基于实验明确给出,对理解凝胶电池的优良性能以及开发气相二氧化硅作为胶凝剂具有积极意义。

Study on internal resistance of gel lead-acid battery

The viewpoints about the internal resistance of gel batteries were analyzed.The experiments about ion adsorption on silica,ion conductance and ion diffusion measured by cyclic voltammetry (CV) were specially designed and performed to reveal the state of ions after the addition of fumed silica into sulphuric acid solution and the formation of gel.The results indicate it is favorable to the transmission of ions when fumed silica is added and the gel is formed.Maximum promotion occurs at 5％-6％ of fumed silica.The adsorption of sulphuric acid on fumed silica particles is so few that this effect is negligible for the battery.The conclusions based the experiments is of significance on the understanding the properties of gel battery and developing fumed silica as gelling agent.