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对采用双辊快淬法制备的纳米晶稀土贮氢合金Ml(NiCoMnAl)5相结构、贮氢性能和电化学充放电性能进行了研究分析.x射线衍射分析(xRD)结果表明,合金片由均匀的CaCu5相组成,其晶粒尺寸平均为20~40 nm.PCT测试表明,该合金具有很好的平台特性和较小的滞后效应.将合金粉压成极片组装成模拟电池以300mA·g-1(1 C)电流充电,分别以2000 mA·g-1(7 C)和3000 mA·g-1(10 C)电流放电至0.9 V和0.8 V,其电化学容量分别达到250和230mAh·g-1.在7 C放电情况下,经450循环后,容量衰减率小于20%.

参考文献

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