期刊
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS
卷 22, 期 1, 页码 -出版社
UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS
DOI: 10.1590/1980-5373-MR-2018-0458
关键词
Lithium borohydride; Reactive hydride composite; Hydrogen storage property; Reactive mechanism
资金
- National Natural Science Foundation of China [U1503192, 51371008]
- Key Project of Outstanding Young Talents in Universities of Anhui Province [gxyqZD2016067]
The Mg10YNi alloy was hydrogenated and then coupled with LiBH4 to form LiBH4/Mg10YNi-H reactive hydride composite. The results indicate that thermal dehydrogenation stability of LiBH4 can be remarkably reduced by combining with Mg10YNi hydride. The starting and ending temperatures for hydrogen desorption from the LiBH4/Mg10YNi-H composite are approximately 275 and 430 degrees C, respectively. Dehydrogenation of the LiBH4/Mg10YNi-H composite proceeds mainly in two steps with a total reaction of 12LiBH(4) + 2.5Mg(10) YNiH20 -> 24Mg + MgNi2.5B2 + 2.5YB(4) + 12LiH + 43H(2). After rehydrogenation at 450 degrees C under 9 MPa hydrogen pressure, the LiBH4/Mg10YNi-H composite starts to release hydrogen around 260 degrees C, and as much as approximately 5.2 wt.% of hydrogen can be desorbed during the second dehydrogenation process.
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