Electrochemical and electronic properties of nanocrystalline Mg-based hydrogen storage materials

被引：0
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作者：
Szajek, A. [1 ]
Jurczyk, M. [2 ]
Okońska, I. [2 ]
Smardz, K. [2 ]
Jankowska, E. [3 ]
Smardz, L. [1 ]
机构：
[1] Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179 Poznań, Poland
[2] Institute of Materials Science and Engineering, Poznań University of Technology, Sklodowska-Curie 5 Sq, 60-695 Poznań, Poland
[3] Central Laboratory of Batteries and Cells, Forteczna 12/14 St, 61-362 Poznań, Poland
来源：
Journal of Alloys and Compounds | 2007年 / 436卷 / 1-2期
关键词：
Nanocrystalline metal hydrides are a new class of materials in which outstanding performance may be obtained by proper engineering of the microstructure. In this work; we have studied experimentally the structure; electrochemical and electronic properties of nanocrystalline Mg2Cu and Mg2Ni alloys. These materials were prepared by mechanical alloying (MA). In the nanocrystalline Mg2Cu powder; discharge capacity up to 26 mAh g-1 was measured. It was found that nickel substituting copper in Mg2Cu1-xNix alloy greatly improved the discharge capacity of studied material. In nanocrystalline Mg2Ni powder; discharge capacities up to 100 mAh g-1 were measured. Finally; the electronic properties of nanocrystalline Mg-based alloys are compared to those of polycrystalline samples. The studies show; that electrochemical properties of Mg-based powders are the function of the microstructure and the chemical composition and of used electrode materials. © 2006 Elsevier B.V. All rights reserved;
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页码：345 / 350
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