超级电容器
材料科学
杂原子
X射线光电子能谱
拉曼光谱
碳纤维
电容
化学工程
比表面积
电化学
聚合
兴奋剂
形态学(生物学)
电流密度
电极
纳米技术
聚合物
催化作用
复合数
复合材料
化学
有机化学
光电子学
物理化学
戒指(化学)
工程类
物理
光学
生物
量子力学
遗传学
作者
Yuling Zhu,Yongtao Tan,Haibo Li
标识
DOI:10.1016/j.est.2023.107871
摘要
Heteroatom doped carbon materials have always been the focus of the research for supercapacitors. N, O co-doped carbon nanosheets (NOCNS) were synthesized by heating-treatment of self-polymerization of dopamine in situ grown on surface of C3N4 as a template. Morphologies and structure information were charactered by SEM, TEM, XRD, XPS, Raman and BET. The results exhibited that nanosheets morphology with thickness of about 1.4 nm and highly graphitization degree (ID/IG = 1.14). The effects of temperature and ratio of C3N4 to dopamine on electrochemical performance were investigated. The obtained NOCNS could achieve a maximum specific surface area of 190.7 m2 g−1 in an optimized condition of 800 °C and ratio of 1:2, reaching a maximum specific capacitance of 287.5 F g−1 at a current density of 0.5 A g−1. The assembled supercapacitor device could exhibit an energy density of 10.6 Wh kg−1 with a good cycle life.
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