Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effect of CNT Addition on the Hydriding and Dehydriding Rates of Mg-Ni-Fe2O3 Alloy

  • Song, Myoung Youp (Division of Advanced Materials Engineering, Department of Hydrogen and Fuel Cells, Research Center of Advanced Materials Development, Engineering Research Institute, Chonbuk National University) ;
  • Kwak, Young Jun (Department of Materials Engineering, Graduate School, Chonbuk National University) ;
  • Lee, Byung-Soo (Division of Advanced Materials Engineering, Chonbuk National University) ;
  • Park, Hye Ryoung (School of Applied Chemical Engineering, Chonnam National University) ;
  • Kim, Byoung-Goan (Korea Energy Materials Ltd.)
  • Received : 2011.07.12
  • Published : 2011.12.25
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Abstract

Samples with compositions of 80 wt% Mg-14 wt% Ni-6 wt% $Fe_2O_3$ (named $Mg-Ni-Fe_2O_3$), and 78 wt% Mg-14 wt% Ni-6 wt% $Fe_2O_3-2$ wt% CNT (named $Mg-Ni-Fe_2O_3-CNT$ ) were prepared by reactive mechanical grinding. Hydriding and dehydriding properties and effects of CNT addition on the hydriding and dehydriding rates of $Mg-Ni-Fe_2O_3$ were then investigated. Activation of the $Mg-14Ni-6Fe_2O_3$ sample was completed after three hydriding (under 12 bar $H_2$)-dehydriding (under 1.0 bar $H_2$) cycles at 573 K. The addition of CNT to the $Mg-14Ni-6Fe_2O_3$ sample made the activation process unnecessary, with a small decrease in the hydrogen-storage capacity.

Keywords

Acknowledgement

Supported by : Ministry of Science and Technology

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