二氧化铅电极放电特性的研究

本文用支流阻抗的实验方法测量正极在不同放电深度时的交流阻抗并用扫描电镜观察其微观结构变化。实验表明，正极在放电过程中欧姆阻抗不断增大，放电末期已增至很大，原来的ＰｂＯ＿２导电网络被破坏。加上此时浓差极化和电化学极化也急剧增大，最终导致放电反应不能继续进行。

Research on the Discharge Character of Lead Dioxide Electrode

In this paper,the impedance method was used to measure the impedance ofpositive electrode in different depth of discharge and the SEM method was emplaped toobserve its microstructure change. Experiments showed that in the discharge processthe ohmic resistence of positive increases continuously and to the end of discharge theresistence has been considerable. The original conductive network of lead dioxide wasdestroyed.In addition with the polarizations of concentration and electrochemicalreaction also increase rapidly.At last,the discharge reaction does not continue.