（Ｚｒ，Ｔｉ）（Ｖ，Ｍｎ，Ｐｄ，Ｎｉ，Ｆｅ）_２系贮氢电极合金具有较高的电化学容量（３７１ｍＡ·ｈ／ｇ）．在充放电循环过程中，发生合金组元有选择地溶出，致使合金Ｃｌ４主相结构严重畸变，逐渐丧失了可逆贮氢能力．ＸＰＳ结果表明，贮氢电极合金内３ｄ过渡族元素因氧化并溶于ＫＯＨ中而在电极合金表面贫乏．降低合金中Ｔｉ含量，可提高（Ｚｒ，Ｔｉ）（Ｖ，Ｍｎ，Ｐｄ，Ｎｉ，Ｆｅ）_２系贮氢电极合金的循环稳定性能．
(Zr1-yTiy)(V,Mn,Pd,Ni,Fe)2 hydride electrodes have higher electrochemical capacities(371 mA . h/g at a current of 50 mA/g and room temperature). The electrochemical capacities of electrodes decayed during cycling due to severe oxidation of 3d transition metals and selective dissolution of some alloy components, which brings lattice distortion of C14 Laves phase and lose of hydrogen storage ability. The decrease in Ti content is favourable to prolong the cycling lives of hydride electrodes. Correspondent:( YANG Xiaoguang, lecturer, Department of Materials Scicnce and Engineering, Zhejiang University, Hangzhou 310027)
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