Ynthesis and Characterization of Nonstructural MG2NI with Replacement Diffusion Method

Yanqiu Jin, Xiuyun Yang, Yunhui Li, Wenjuan Zhang, Limin Wang and Yaoming Wu

Modern Applied Science, 2010, vol. 4, issue 8, 114

Abstract: Nonstructural Mg2Ni powder was prepared by replacement-diffusion method. The structure of the Mg2Ni powder was investigated by X-ray diffraction and transmission electron microscopy. Crystallographic structure analysis showed that the synthesized sample powder was constituted with Mg2Ni and a small fraction of MgO. The TEM image in low-resolution indicated that the diameter of the synthesized Mg2Ni powder was in the range of 20~80 nm, and the high-resolution transmission electron microscope (HRTEM) image suggested that the interlinear spacing of (113) lattice planes was 0.229 nm, and the specific surface area examined was 50 m2 /g. The electrochemical hydrogen storage capacity of the Mg2Ni power was also measured in this work. It was 82.5 mAh g-1. The reasons of the low capacity hydrogen storage and decrepitating were analyzed, and the mainly cause were the grievous oxidation of the powder and the pulverization.

Date: 2010
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