采用简易溶剂热法成功制备出了氮掺杂石墨烯(N-GNSs),结构表征显示其形貌良好.X射线光电子能谱(XPS)结果表明在溶剂热过程中,氧化石墨烯表面的大部分含氧功能团已被成功除去,而且二甲基甲酰胺中的氮原子通过吡咯氮和石墨氮的形式成功掺杂到石墨烯结构中.作为电极活性材料,N-GNSs展现出优异的电容特性,在2 mol/LKOH电解液中电流密度为0.5 A/g时比电容可达181.3 F/g.此外,N-GNSs还展示出良好的循环稳定性,2000次连续循环后容量仍保持为初始数值的92.5％.因此,氮掺杂石墨烯是一种潜在的超级电容器电极材料.
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