石墨烯/碳纳米管复合粉体制备工艺的研究

Research on Preparation Process of Graphene Platelets/Carbon Nanotube Mixture Powders

研究了利用膨化石墨制备石墨烯/碳纳米管复合粉体技术。以膨胀石墨为基体,利用硝酸铁、碳酸铵等对其进行修饰,结合化学气相沉积工艺,原位制备出石墨烯/碳纳米管复合粉体材料;研究了不同的修饰液相、不同沉积工艺对复合粉体比例、微观形貌的影响。利用扫描电镜对复合粉体进行了表征。结果表明,实现了石墨烯/碳纳米管复合粉体材料的批量制备;其中石墨烯为透明薄片,其厚度最小可达到10nm;通过控制工艺参数,可以实现碳纳米管/石墨烯的质量比在0.625～8.250之间变化;并初步获得了最佳修饰液相和最佳工艺。研究结果表明该方法可以制备出性能优异的石墨烯/碳纳米管复合粉体材料。

It has been explored for synthesizing in situ mixture powder of graphene platelet（NGP） and carbon nanotube（CNT） using expanded graphite（EG） as the catalyst support through CVD technology. The structures of the mixture powder were characterized by SEM. The results showed that it was easy to produce in mass the mixture powder using general CVD. The graphene platelets in this mixture powder were plane structure and only 10nm thick. The ratio of the CNT/NGP, which generally ranged from 0. 625 to 8. 250, could be adjusted through adjusting deposition parameters. And the optimal catalyst and optimal process have been acquired roughly. Research conclusion show that the excellent performance of NGP/CNT mixture powder materials can be prepared by this method.