Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Hydrogen Storage Characteristics of Melt Spun Mg-23.5Ni-xCu Alloys and Mg-23.5Ni-2.5Cu Alloy Mixed with $Nb_{2}O_{5}$ and $NbF_{5}$

  • Hong, Seong-Hyeon (Powder Materials Technology Group, KIMS, Korea Institute of Machinery and Materials) ;
  • Kwon, Sung-Nam (Division of Advanced Materials Engineering, Department of Hydrogen and Fuel Cells, Hydrogen & Fuel Cell Research Center, Engineering Research Institute, Chonbuk National University) ;
  • Song, Myoung Youp (Division of Advanced Materials Engineering, Department of Hydrogen and Fuel Cells, Hydrogen & Fuel Cell Research Center, Engineering Research Institute, Chonbuk National University)
  • Received : 2010.11.25
  • Published : 2011.04.25
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Abstract

Mg-23.5 wt%Ni-xwt%Cu (x = 2.5, 5 and 7.5) samples for hydrogen storage were prepared by melt spinning and crystallization heat treatment from a Mg-23.5 wt%Ni-5 wt%Cu alloy synthesized by the gravity casting method. They were then ground under $H_2$ to obtain a fine powder. Among these samples the Mg-23.5Ni-2.5Cu sample had the highest hydriding and dehydriding rates after activation. The Mg-23.5Ni-2.5Cu sample absorbed 3.59 and 4.01 wt%H for 10 and 60 min, respectively, at 573K under 12 bar $H_{2}$. The activated 88(87.5Mg-10Ni-2.5Cu)-$5Nb_{2}O_{5}-7NbF_{5}$ sample absorbed 2.93 wt%H for 10 min, and 3.14 wt%H for 60 min at 573K under 12 bar $H_{2}$.

Keywords

Acknowledgement

Supported by : Ministry of Science and Technology

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