Hydrogen storage properties of the mixtures MgH2–Li3N with different molar ratios
Hydrogen storage properties of the mixtures MgH2–Li3N with different molar ratios
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不同摩尔比的MgH2-Li3N混合物的储氢性能
DOI:
10.1016/j.jallcom.2014.12.081
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发表时间:
2015-10
影响因子:
6.2
通讯作者:
Ying Wu
中科院分区:
文献类型:
--
作者:
Bao Zhang;Wei Li;YuJie Lv;Youhua Yan;Ying Wu
LiMgN, with a theoretical gravimetric hydrogen capacity of 8.2 wt.%, is one of the promising hydrogen storage materials. Different molar ratios of MgH2–xLi3N (x= 0.5, 1, 2) mixtures were prepared by ball milling in order to obtain large amount of LiMgN. It reveals that the higher content of Li3N is effective for the formation of LiMgN. XRD patterns show that the constituents of the phases are changed with molar ratios of MgH2and Li3N. The phases of Mg3N2, MgH2and LiH are obtained in the MgH2–0.5Li3N mixture, but, LiMgN and LiH phases are detected in the MgH2–(1, 2) Li3N mixtures. The hydrogen storage properties of the as-prepared mixtures were studied by a Sieverts’-type apparatus. Powder XRD and FTIR measurements were used to identify the phase structures of the products during the hydrogenation/dehydrogenation process. The reaction mechanisms during the hydrogenation/dehydrogenation process are discussed.
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