结合Mg-C纳米晶复合储氢材料的研究,对目前大容量镁基储氢材料研究结果进行了分析,指出用机械合金化法制备Mg纳米晶可提高其储氢密度、改善其动力学性能,但材料放氢温度一般较高。作者课题组将碳微晶与Mg复合,并引入金属催化剂,以降低MgH2分解温度。差热扫描量热分析(DSC)表明Mg-C纳米晶复合储氢材料的初始放氢温度为201~240℃,降低了60~90℃,其热力学性能得到了较大的改善。 Based on the research of Mg-C nanocrystalline composite hydrogen storage materials, the research results of large capacity Mg-based hydrogen storage materials are analyzed. It is pointed out that Mg nanocrystalline prepared by mechanical alloying can improve its hydrogen storage density and improve its kinetic performance , But the material discharge temperature is generally higher. The authors group the carbon crystallites and Mg composite, and the introduction of metal catalysts to reduce the decomposition temperature of MgH2. Differential scanning calorimetry (DSC) showed that the initial hydrogen evolution temperature of the Mg-C nanocomposite hydrogen storage material was between 201 and 240 ℃, decreased by 60 ~ 90 ℃, and its thermodynamic properties were greatly improved.