【作者】 张亚婷； 任绍昭； 蔡江涛； 刘国阳； 党永强； 缪文超；

【Author】 Yating Zhang;Shaozhao Ren;Jiangtao Cai;Guoyang Liu;Yongqiang Dang;Wenchao Miao;College of Chemistry & Chemical Engineering,Xi’an University of Science and Technology;

【机构】 西安科技大学化学与化工学院；

【摘要】 石墨烯基复合电极材料由于其高电子迁移率以及巨大的比表面积^[1-3],在超级电容器的应用中具有巨大的潜力。本文采用水浴加热将氨基功能化碳点（CDs）通过C-N共价键固定在氧化石墨片表面和边缘上,然后经氢等离子还原得到碳点/还原氧化石墨烯复合物（CDs/rGO）;进而通过恒电流充放电以及循环伏安测试等手段对材料的电容性能进行研究。结果表明:在一定范围内增加CDs有助于提高CDs/r GO复合材料的电容性能,其中CDs质量比为50%的样品50-CDs/rGO在1 mol/L H₂SO₄电解液中展现出良好的电化学可逆性和较高的比电容（211.9F/g）,充放电循环1000次以后的电容保持率为92.8%。更多还原

【Abstract】 Graphene-based composite electrode materials have been attracting more and more interest in application of supercapacitor due to their high electron mobility and large specific surface area^[1-3]. In this paper, a new graphene-based electrode material for supercapacitors is reported. The carbon dots/reduced graphene oxide（CDs/rGO） composites were fabricated by water bath combining with the hydrogen plasma reduction and the carbon dots（CDs） were anchored on the graphene oxide（GO） through covalent bond. Furthermore, its capacitive properties in aqueous electrolyte were studied by galvanostatic charge-discharge（GQD） and cyclic voltammetry（CV） tests. The results showed that the capacitance of rGO increased when adding the CDs the 50-CDs/rGO exhibited good reversibility and high specific capacitance（211.9 F/g） in 1M H₂SO₄ aqueous electrolyte and the specific capacitance of 50-CDs/rGO retains 92.8% of its original values after 1000 cycles.更多还原