研究了La0.55Pr0.05NdxMg0.4-xNi3.3Al0.1(x=0.10,0.15,0.20)储氢合金的电化学性能.随着合金中Nd/Mg比的增加,合金电极的放电平台逐渐降低,电极极化减小.x=0.15的合金具有较高的电化学容量(372mAh·g-1),而x=0.10的合金具有较好的倍率放电能力(HRD1800=73.1%).合金电极的循环寿命随着Nd含量的增加而逐渐改善.合金电极的电化学阻抗谱(EIS)表明,随Nd含量减小,合金电极的电荷迁移电阻逐渐减小,动力学性能增强.线性极化测试表明,随着Nd/Mg比的减小,合金电极表面的电化学反应速率增加.通过合金电极阳极电流对时间响应的半对数曲线计算的氢扩散系数随着Nd/Mg比降低而增加,说明合金内部的氢扩散能力也提高.
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