Magnesium-nickel hydrogen storage alloys prepared by hydriding combustion synthesis followed by mechanical milling
by Liquan Li, Yunfeng Zhu, Hao Gu, Xiaofeng Liu
International Journal of Nuclear Hydrogen Production and Applications (IJNHPA), Vol. 2, No. 2, 2009

Abstract: Recent progress is reviewed in the preparation of highly active magnesium-based hydrogen storage alloys by the combined process of Hydriding Combustion Synthesis (HCS) and Mechanical Milling (MM). The structural transformation of the alloys during MM determined by means of X-ray Diffraction (XRD) and the hydrogen storage properties of the alloys measured by means of Pressure-Concentration-Temperature (PCT) are reported. The HCS alloy of Mg98Ni2 after MM showed the highest hydrogen capacity of 5.60 wt.% at 373 K within 100 s and the dehydriding onset decreased from about 640 K of the HCS product to 480 K of the HCS + MM product. Besides, the absorption capacity at 373 K in 30 s increased from 3.85 wt.% for the HCS + MM product of Mg95Ni5 without Nb2O5 to 5.09 wt.% for that with 1 at.% Nb2O5. The results demonstrated that the method of HCS + MM has potential in the preparation of magnesium-based materials for vehicular application.

Online publication date: Thu, 30-Apr-2009

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