铅基稀土合金作为正极板栅的阳极膜性能

采用交流阻抗（EIS)、交流伏安（ACV）、循环伏安(CV)、腐蚀失重实验等方法研究了铅-钙-锡-铝-银合金中添加混合镧铈稀土在硫酸溶液中的阳极行为。 实验结果表明，混合镧铈稀土的添加能有效抑制阳极Pb(Ⅱ)膜的生长，降低Pb电极表面生成的Pb(Ⅱ)膜氧化膜电化学反应阻抗，改善阳极膜的导电性。 增强合金的耐腐蚀性能，并且增加析氧的过电位，抑制氧气的析出,降低电池的早期容量损失。 混合镧铈稀土的添加有利于提高电池的深循环寿命。 当镧铈混合稀土质量分数为0.5％时，各方面综合性能更优，效果更好。

Performance of Anodic Films Formed on Lead Based-Rare Earth Alloys as Positive Grid

The anodic behaviors of Pb-0.07% Ca-1.2% Sn-0.05% Al-0.1% Ag-(0, 0.01%, 0.15%, 0.5%) mixed rare earth alloys in sulfuric acid solution were studied by means of electrochemical impedance spectroscopy(EIS), A.C. voltammetry, cyclic voltammetry and corrosion mass loss tests, respectively. The experimental results show that the mixed rare-earth in the Pb Ca-Sn-Al-Ag alloy can improve the corrosion resistance. Moreover, the oxygen overpotentials of the electrodes with mixed rare earth are higher than those of their counterparts. The results show that the addition of rare-earth can inhibit the growth of the anodic Pb(Ⅱ) oxides and can also improve the corrosion resistance. It was shown that rare earth element can compensate for the effect of premature capacity loss for the Pb-Ca-Sn-Al-Ag content. The La-Ce mixed rare earth with a content of 0.5% exhibited better comprehensive performances in all aspects.