纳米晶Mg2Ni1-xCrx(x=0,0.1,0.2,0.3)合金由纯Mg、Ni、Cr粉在500℃经3 h烧结后机械球磨而成.在210℃吸氢、250℃放氢的条件下,添加Cr后合金的最大吸放氢量明显提高;纳米Mg2Ni08Cr0.2合金的气态储氢量和吸氢动力学性能较好,第-次放氢量就达到3.0%,并且循环稳定性良好,吸氢后生成Mg2NiH4、Mg2NiH0.24相.纳米Mg2Ni0.7Cr0.3合金的放氢量在不经过活化的条件下便达到最大值,然而循环稳定性差,这是由于循环过程中有MgH2生成而造成的.
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