Hydrogen storage properties of Mg-30 wt.% LaNi5 composite prepared by hydriding combustion synthesis followed by mechanical milling (HCS + MM)
Hydrogen storage properties of Mg-30 wt.% LaNi5 composite prepared by hydriding combustion synthesis followed by mechanical milling (HCS + MM)
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DOI：
10.1016/j.ijhydene.2008.11.078
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发表时间：
2009-02
影响因子：
7.2
通讯作者：
H. Gu;Yunfeng Zhu;Liquan Li
中科院分区：
文献类型：
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作者：
H. Gu;Yunfeng Zhu;Liquan Li
采用氢化燃烧合成-机械球磨(HCS+MM)工艺制备了镁-30wt.%LaNi5复合材料，并与HCS产品和MM产品的吸放氢性能进行了比较。MM和HCS+MM产物的脱水温度均为470K，比HCS产物低100K。此外，HCS+MM产物的脱附速度快于MM产物，如前者在加热到510K时完全脱附，而后者直到590K才完全分解。另外，在50s的373K时，HCS+MM产物的饱和吸氢量达到3.80wt.%，而在1800s的373K时，HCS产物和MM产物的吸氢量均小于1.50wt.%。这些结果表明了HCS+MM工艺在制备镁基储氢材料方面的潜力。
A Mg–30wt.% LaNi5composite was prepared by hydriding combustion synthesis followed by mechanical milling (HCS+MM), and the hydriding and dehydriding properties of the HCS+MM product were compared with those of the HCS product and the MM product. The dehydriding temperature onsets of the MM and HCS+MM products were both 470K, which were lower than that of the HCS product by 100K. Moreover, the HCS+MM product desorbed faster than the MM product, e.g., the former desorbed completely upon heating to 510K, whereas the latter did not decompose completely until 590K. Additionally, the HCS+MM product reached a saturated hydrogen absorption capacity of 3.80wt.% at 373K in 50s, but both the HCS product and the MM product absorbed less than 1.50wt.% of hydrogen at 373K in 1800s. These results suggest the potential of the HCS+MM processing in preparing Mg-based hydrogen storage materials.