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| Preparation and Hydrogen Storage Performance of Composite Materials of LiAlH4/4MgH2+5%M(M=0, NbSi2, Ni2Si, Nb2O5) |
Xiantun HUANG( ),Peilin QING,Changsheng QIN |
| Department of Materials Science and Engineering, Baise College, Baise 533000, China |
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Cite this article:
Xiantun HUANG,Peilin QING,Changsheng QIN. Preparation and Hydrogen Storage Performance of Composite Materials of LiAlH4/4MgH2+5%M(M=0, NbSi2, Ni2Si, Nb2O5). Chinese Journal of Materials Research, 2016, 30(10): 781-786.
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Abstract Composite materials of LiAlH4/4MgH2+5% (mass fraction) M (M = NbSi2, Ni2Si and Nb2O5 respectively) were prepared by mechanical alloying in hydrogen atmosphere, and the hydrogen storage properties of the composite materials, as well as LiAlH4 and MgH2 were investigated. The results show that the kinetics property and thermodynamic property of the 4MgH2/TiH2 can be improved by adding NbSi2, Ni2Si and Nb2O5 respectively. DTA curves (by a heating rate 5 K/min) show that the peak temperature within the low temperature range of the hydrogenation for the corresponding composite materials decreased by 19 K, 15 K and 23 K respectively, especially the catalyst effect of which become more obvious after adding Ni2Si and Nb2O5. The activation energy of the LiAlH4/4MgH2 composite is 145.71 kJ/mol, however, after adding Ni2Si and Nb2O5, which decreases to 142.12 kJ/mol and 115.12 kJ/mol respectively.
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Received: 14 March 2016
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| Fund: *Supported by Natural Science Foundation of Guangxi Province No. 2014GXNSFAA118346 and Characteristic and Curriculum Integration Construction of Higher Education in Guangxi Province No. GXTSZY024. |
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