Remarkably improved hydrogen storage properties of carbon layers covered nanocrystalline Mg with certain air stability

Effect of Carbonized 2-Methylnaphthalene on the Hydrogen Storage Performance of MgH2

“…Further, the amorphous carbon is distributed around the Mg particles, which can effectively reduce the agglomeration of Mg during the ball-milling process, thereby facilitating the diffusion of hydrogen in the subsequent hydrogenation process and contributing to the improvement of the cycling property of MgH 2 . In addition, in the processes of hydrogenation and dehydrogenation, the amorphous-carbon-surrounded Mg particles provide active sites and diffusion channels for hydrogen atoms, thereby delivering high hydrogenation and dehydrogenation rates of the composite . In summary, the amorphous carbon attached to the surface of the Mg particles is the reason for the excellent hydrogen storage performance of the CMN-MgH 2 composite.…”

“…Carbon materials with simple structures also show improvements to the hydrogen storage performance of Mg-based hydrogen storage materials. Zhang and co-workers reported a Mg–C composite, where Mg was covered by carbon layers . They found that the Mg–C released 6.5 wt % of H 2 at about 598 K in 20 min; notably, the Mg–C showed prominent air stability, so that the dehydrogenation capacity and kinetics were basically unchanged after the sample was placed in the air for 60 min.…”

“…Zhang and co-workers reported a Mg−C composite, where Mg was covered by carbon layers. 42 They found that the Mg−C released 6.5 wt % of H 2 at about 598 K in 20 min; notably, the Mg−C showed prominent air stability, so that the dehydrogenation capacity and kinetics were basically unchanged after the sample was placed in the air for 60 min. In conclusion, the addition of carbon materials contributes remarkably to the improvement of the kinetic and thermodynamic performances of the Mg/ MgH 2 system.…”

The impacts of nitrogen doping on the electrochemical hydrogen storage in a carbon

“…In addition, hydrogen also has the advantages of high energy density (about 33.3 kWh kg −1 ), abundant resources, and sustainable utilization. [1][2][3][4][5][6][7][8][9][10][11][12] Hydrogen is widely applied in many reams, such as nickel-hydrogen batteries, fuel cells, and hydrogen-powered vehicles. [13][14][15] There are three stages in the hydrogen energy supply chain: hydrogen preparation, hydrogen storage and transportation, and hydrogen applications.…”

“…Owing to the final combustion product is non‐toxic and pollution‐free water, hydrogen is regarded as one of the cleanest energy forms in the world. In addition, hydrogen also has the advantages of high energy density (about 33.3 kWh kg −1 ), abundant resources, and sustainable utilization 1‐12 . Hydrogen is widely applied in many reams, such as nickel‐hydrogen batteries, fuel cells, and hydrogen‐powered vehicles 13‐15 .…”