Hydrogen storage properties of two alloys of La0.5 Y0.5 Ni4.8 Mn0.1 Al0.1 and Lao. 5 Y0.5 Ni4.8 Al0. 2 were systematically investigated. Experimental results showed that the pressure-content isothermal curves of both alloys were almost the same But the hysteresis coefficient of La0.5 Y0.5 Ni4.8 Al0. 2 alloy was lower, resulting in greater hydrogen storage capacity and faster absorption kinetics. It was also found that although the kinetics characteristic of La0. 5-Yo. 5 Ni4.8 Al0.2 alloy has weakened after 300 absorption/desorption cycles, it was still keeping on a good storage properties and a nice pulverization resistance.%针对两种新型稀土型储氢合金La0.5 Y0.5 Ni4.8 Mn0.1 Al0.1和La0.5 Y0.5 Ni4.8 Al0.2的储氢特性进行研究分析.实验表明,相同温度下,La0.5 Y0.5 Ni4.8 Mn0.1 Al0.1 和 La0.5 Y0.5 Ni4.8 Al0.2合金的PCT曲线基本重合,且都具有优良的吸氢动力学性能；相比之下,后者的滞后系数要小于前者,吸氢量较大,吸氢速率也较快,故其储氢性能较优.300次吸放氢循环实验结果表明,La0.5 Y0.5 Ni4.8 Al0.2合金的吸氢动力学性能虽然略有下降,但抗粉化性能较好.
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