新型储氢复合材料Mg/MWNTs的氢化性能(英文)

Hydriding/dehydriging Properties of Advanced Hydrogen Storage Mg/MWNTs Composites

采用催化反应球磨方法,研制成复合材料Mg-MWNTs(w=5％,20％)。利用储放氢实验装置,测试了Mg/MWNTs吸放氢动力学性能。研究发现,复合材料Mg-MWNTs(w=5％,20％)在298K和2.0MPa氢压时最大储氢量都很低;在373K、473K和553K温度时,Mg-5％(w)MWNTs的最大储氢量分别为5.34％、5.89％和6.08％;而Mg-20％(w)MWNTs只有2.11％、2.68％和2.75％。与其它储氢复合材料相比,复合材料Mg-5％(w)MWNTs在保持较好的最大储氢量基础上,具有很好的吸放氢动力学性能。

The composite Mg-wMWNTs(w = 5%, 20%) was made by catalytic reacting ball-milling under the hydrogen atmosphere. The absorption/desorption kinetics for the composite Mg/MWNTs were examined by taking the apparatus for hydrogen adsorption/desorption. It was found that under 2.0 MPa hydrogen pressure, the maximum hydrogen storage capacities of the two composites(w = 5% ,20%) were very low and similar at 298, 373, 473 and 553 K, the maximum hydrogen storage capacities of the Mg-5%(w) MWNTs were respectively 5.34%, 5.89% and6.08%; however, only 2.11%, 2.68% and 2.75% for the Mg-20%(w) MWNTs. Compared with the other hydrogen storage composite materials, the Mg-5%(w) MWNTs not only keeps the maximum hydrogen storage capacities better but also has good hydrogen absorption/desorption rates.