The Effect of High-Energy Ball Milling Conditions on Microstructure and Hydrogen Desorption Properties of Magnesium Hydride and Single-Walled Carbon Nanotubes

Magnesium hydride is considered to be one of the most promising hydrogen storage materials, although it nevertheless has some problems, such as high value activation energy desorption. To solve this problem, scientists have proposed adding nanocarbon in particular carbon nanotubes, magnesium hydride. Currently, a detailed understanding mechanisms obtaining composites based on and nanotubes lacking, our effect additives temperature desorption depending parameters composite synthesis. In addition, data obtained at various values milling are very different, works nanomaterials properties was not confirmed all. Thus, important determine under parameters. This work devoted study determination dependences synthesis Composite powders containing MgH2 with 5 wt.% single-walled (SWCNT) were prepared using planetary ball mill. The carried out speeds, namely 300, 660, 900 rpm. Results suggested that structure preserved prolonged grinding SWCNT mill for 180 min relatively low speed 300 these lowest an H2 162 ± 1 kJ/mol H2, which 15% lower than (189 H2).