This study focuses on the preparation of a Mg₂Ni hydrogen storage alloy through high-energy ball milling, further enhanced by composite graphene and multi-walled carbon nanotubes (MWCNTs) modification. It is evident that high-energy ball milling successfully incorporates graphene and MWCNTs onto the surface of Mg₂Ni particles. This process not only creates surface defects but also establishes hydrogen pathways, facilitating the absorption and desorption of hydrogen. This improvement enhances the performance of hydrogen storage. With an increase in the composite quantity of graphene and MWCNTs, a more noticeable lubrication and grinding aid effect become evident during the ball milling process. This effect promotes more efficient grain refinement and minimizes agglomeration and welding phenomena. A comparative analysis with the Mg₂Ni alloy reveals that the activation duration for the composite hydrogen storage alloy material significantly decreases. Concurrently, the kinetic performance sees substantial enhancement, and the temperature needed for hydrogen absorption and discharge is correspondingly reduced.

本研究重点通过高能球磨制备Mg _{2 Ni储氢合金，并通过复合石墨烯和多壁碳纳米管（MWCNT）改性进一步增强。}很明显，高能球磨成功地将石墨烯和多壁碳纳米管结合到Mg ₂ Ni颗粒的表面上。这个过程不仅会产生表面缺陷，还会建立氢通道，促进氢的吸收和解吸。这一改进提高了储氢性能。随着石墨烯与多壁碳纳米管复合量的增加，球磨过程中润滑助磨效果更加明显。这种效应促进更有效的晶粒细化并最大限度地减少团聚和焊接现象​​。与Mg ₂ Ni合金的对比分析表明，复合储氢合金材料的活化持续时间显着缩短。同时，动力学性能大幅提高，吸放氢所需的温度也相应降低。