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http://dx.doi.org/10.3365/KJMM.2011.49.12.989

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.)
Publication Information
Korean Journal of Metals and Materials / v.49, no.12, 2011 , pp. 989-994 More about this Journal
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
hydrogen absorbing materials; mechanical alloying/milling; microstructure; X-ray diffraction; CNT addition;
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