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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >On the characterization of La_(1.5)Mg_(17)Ni_(0.5) composite materials prepared by hydriding combustion synthesis
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On the characterization of La_(1.5)Mg_(17)Ni_(0.5) composite materials prepared by hydriding combustion synthesis

机译：氢化燃烧合成制备La_（1.5）Mg_（17）Ni_（0.5）复合材料的表征

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摘要

The method of hydriding combustion synthesis has been employed to prepare a ternary La_(1.5)Mg_(17)Ni_(0.5) alloy that exhibits a large hydrogen storage capacity rapidly hydriding/dehydriding (H/D) kinetics at moderate conditions. The ternary La_(1.5)Mg_(17)Ni_(0.5) alloy shows much better HID kinetics than pure Mg, the binary Mg-Ni and Mg-La hydrogen storage alloys. It can absorb 5.40 mass percent H at 573 K at excellent speed without any activation process. This composite absorbed 90 percent of its full hydrogen capacity (4.34 mass percent H) and desorbed the same percentage (4.12 mass percent H) in <5 min at 523 K, which is over 30 times faster than La_2Mg_(17) under the same conditions. Moreover, it can absorb 4.10 mass percent H and desorb 4.01 mass percent H at low temperature (473 K), respectively. This attractive characteristic of the alloy can be explained by the catalytic action of LaNi_5 + LaH_3 + La as well as the multiphase structure which existed in the reaction process.
机译：已经采用氢化燃烧合成的方法来制备三元La_（1.5）Mg_（17）Ni_（0.5）合金，该合金在适度条件下具有大的储氢能力，并具有快速氢化/脱水（H / D）动力学。 La_（1.5）Mg_（17）Ni_（0.5）三元合金的HID动力学比纯Mg，二元Mg-Ni和Mg-La储氢合金要好得多。它可以在573 K下以极好的速度吸收5.40质量百分比的H，而无需任何激活过程。该复合材料在523 K下在<5分钟内吸收了其全部氢容量的90％（4.34质量％H），并解吸了相同百分比（4.12质量％H），这是在相同条件下比La_2Mg_（17）快30倍以上。另外，在低温（473K）下分别吸收4.10质量％的H和解吸4.01质量％的H。合金的这种吸引人的特性可以通过LaNi_5 + LaH_3 + La的催化作用以及反应过程中存在的多相结构来解释。

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