期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 570, 期 -, 页码 114-118出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.03.124
关键词
Hydrogen storage materials; Rare earth compounds; Pressure-composition isotherms; Plateau pressure; X-ray diffraction
资金
- Joint Research Project of ISTK (Korea Research Council for Industrial Science and Technology)
Atomic radius factor-alpha factor related to the composition in (La,Ce,Nd,Pr)(Ni,Co,Mn,Al)(5) alloys, was deduced and used to prepare low-cost alloys. The plateau pressure and hydrogen storage capacity were changed with respect to the crystal lattice volume of the (La,Ce,Nd,Pr)(Ni,Co,Mn,Al)(5), which could be controlled by changing the ratio of the elements in the alloy. Therefore, the plateau pressure and hydrogen storage capacity were adjusted by using the atomic radius factor, defined as the summation of the multiplication of the atomic radii and molar ratios of each element in the alloy. Finally, low-cost alloys (Nd-free/Ce-rich) were designed and prepared using the atomic radius factor. By simultaneously increasing the amounts of Ce and Mn in the alloy, the atomic radius factor and the crystal lattice volume of the alloy could be made similar to those of a commercial alloy. Consequently, it is possible to control the hydrogen storage properties and to prepare low-cost alloys with hydrogen storage properties similar to those of commercial alloy using the atomic radius factor. (C) 2013 Elsevier B.V. All rights reserved.
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