采用XRD、SEM-EDS等方法对Ti0.4Zr0.1V1.1 Mn0.5Ni0Crx(x=0,0.1,0.2,0.3)储氢合金的微观结构及电化学性能进行了表征.XRD分析结果表明Ti0.Zr0.iV1.1Mn0.5Ni0.4Crx(x＝0,0.1,0.2,0..3)储氢合金由BCC结构的V基固溶体主相和少量的C14 Laves第二相组成.SEM-EDS分析结果表明,V基固溶体主相为树枝晶结构,C14 Laves相呈网格状沿着主相晶界析出.电化学测试结果表明,Ti0.4Zr0.1V1.1Mn0.5Ni0.Crx(x=0,0.1,0.2,0.3)氢化物电极在303K下,随Cr含量的增加,最大放电容量分别为574.6mAh/g、418.8mAh/g、368.8mAh/g和322.9 mAh/g.当x=0.3时,合金电极在333K下的最大放电容量达到了824.1mAh/g.Cr的添加显著提高了合金电极的高倍率放电性能和循环寿命,40次充放电循环后Ti0.4Zr0.1V1.1Mn0.5Ni0.4Cr0.3合金电极的容量保持率为62.3％.
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