H2SO4溶液中F-离子对Pb及Pb-Sb电极表面膜影响的研究

Pb-Sb板栅的耐腐蚀性能是影响铅蓄电池寿命的重要原因之一。关于不同Pb合金电极的研究已有不少工作。关于H₂SO₄溶液中添加剂的研究,除H₃PO₄以外,其它一些添加剂的研究不多。鉴于F^-离子的特殊性,我们研究了电解液中F^-离子对Pb、Pb-Sb电极的影响。

THE EFFECT OF F- ION ON THE PROPERTIES OF SURFACE FILM ON Pb,Pb-Sb ELECTRODES IN H2SO4 SOLUTION

In this paper the effects of F^- ion in H₂SO₄ solution on the properties of surface film on Pb,Pb-Sb electrodes have been studied by cyclic potential scanning and X-ray diffrac-tion methods. It has bcen found that in the presence of F^- ion the peak potential of reduc-tion of PbO₂ on Pb-Sb electrode shifts to negative direction markedly and the discharge capacity of PbO₂ decreases rapidly with the number of scanning cycles. On the contrary,the discharge capacity is found to be increased on the Pb-Sb electrode. F^- ion helps the formation of basic PbSO₄ on both Pb and Pb-Sb electrodes, but α-PbO₂ on Pb-Sb electro-de only.