研究了储氢合金 (MlMg)Ni4-xCo0.7Znx (0≤x≤0.3) 的气相储氢特性和电化学性能.结果表明,随着Zn含量的增加,合金吸、放氢 (室温下) 的平台压力降低,最大储氢量减少,分别从1.58% (x=0) 减少到1.44% (x=0.2)、1.19% (x=0.3);合金的放电容量减少,分别从380 mAh/g (x=0) 减少到366 mAh/g (x=0.1)、345 mAh/g (x=0.2)、271 mAh/g (x=0.3),但循环稳定性得到提高,经100次充放电循环后的容量衰减率从16% (x=0) 降低到4% (x=0.3);适当控制Zn含量,既对合金的放电容量无大的影响,又可提高合金放电的稳定性,尤其是在大电流下放电的稳定性.
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