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Mg-based nanomaterials for energy storage

M. JURCZYK1,* , I. OKONSKA1, M. NOWAK1, M. JARZEBSKI1

Affiliation

  1. Institute of Materials Science and Engineering, Poznan University of Technology M. Skłodowska-Curie 5 Sq., 60-965 Poznan, Poland

Abstract

The paper present the advantages of some Mg-based nanostructured hydrogen storage materials. An amorphous and/or nanocrystalline Mg2M (M=Fe, Ni, Cu) hydrogen storage alloys were prepared by mechanical alloying. For example, the powder 2Mg+Cu mixture mechanically alloyed for more than 18 h has transformed directly to an orthorhombic-type phase. In this powder, discharge capacity up to 26 mA h 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 mA h g-1 were measured. Additionally, it was found that the nickel powder addition to 2Mg+M/x wt% Ni is advantageous for the formation of Mg–M amorphous structure and for the improvement of the electrochemical properties of the studied alloys. On the other hand, the reaction of hydrogen gas with Mg2M/Ni nanocomposite is enhanced significantly by the addition of catalysts such as titanium..

Keywords

Mg-based nanomaterials, Mechanical alloying, Electrochemical properties, Hydrogen storage alloys.

Submitted at: Feb. 25, 2008
Accepted at: April 4, 2008

Citation

M. JURCZYK, I. OKONSKA, M. NOWAK, M. JARZEBSKI, Mg-based nanomaterials for energy storage, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 4, pp. 907-912 (2008)