Hydrogenation/dehydrogenation in MgH2-activated carbon composites prepared by ball milling

摘要: Abstract A systematic investigation was performed on the hydrogen storage behaviors of ball-milled MgH2-activated carbon (AC) composites. Differential Scanning Calorimetry (DSC) measurement desorption temperature carried out and indicated that onset peak temperatures both decreased with increasing AC adding amount, for example, shifted from 349 °C 1 wt% to 316 °C 20 wt% AC. Furthermore, it is noted absorption capacity hydriding kinetics composites were also dependent amount AC, optimum condition could be achieved by mechanical milling MgH2 5 wt% The Mg-5wt%AC composite can absorb about 6.5 wt% within 7 min at 300 °C 6.7 wt% 2 h 200 °C, respectively. It demonstrated MgH2-5wt% exhibited good property release 330 °C 30 min. X-ray diffraction patterns (XRD) transmission electron microscopy (TEM) observations revealed grain size synthesized amount. This may contribute improvement in MgH2-AC