The structure, microstructure, thermal stability and hydriding characteristics of amorphous La0.95-Mg2.05Ni9 have been investigated with differential thermal analysis, X-ray diffraction, scanning electron microscopy and battery test. It is found that the increase in mechanical alloying time leads to enhancement in thermal stabilities of amorphous La0.95Mg2.05Ni9 alloy. The amorphous alloy has good charge/discharge ability at room temperature(430 mA·h·g-1), but the discharge capacity decreases seriously during cycling tests due to the crystallization of amorphous and oxidization of magnesium on the particle surface in alkaline aqueous solution.
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