CNTs含量对LaNi_5储氢材料性能的影响

Influence of carbon nanotubes addition on the performance of LaNi_5 hydrogen storage materials

采用机械球磨法制备出不同碳纳米管(CNTs)含量的LaNi5合金复合储氢材料。考察了不同CNTs含量下复合储氢材料的微观结构及电化学储氢性能的影响。结果发现CNTs的加入不同程度地改善了复合材料的性能。其中质量分数为15%CNTs含量的复合材料比容量达到了311mAh/g,比LaNi5母合金比容量提高了21%,经过200次循环后放电比容量仍高达280mAh/g,表现出良好的协同作用和循环性能。

The preparation of the composite materials of carbon nanotubes（CNTs） and LaNi5 hydrogen storage alloys was researched by mechanical methods, and the relationship of the electrochemical hydrogen storage properties of new composite materials and the content of the CNTs was studied. The results show that the properties of LaNi5 hydrogen storage alloys is improved by adulterating CNTs, and when the CNTs content is 15%, the discharge capacity of the composite materials has achieved 311 mAh/g which is enhanced 21% compared to the LaNi5 alloys, and after 200 discharge cycles the discharge capacity is still as high as 280 mAh/g. The composite materials display good synergism and circulates performance.