摘要
以间苯二酚、甲醛、氧化石墨烯和三聚氰胺为原料,通过溶胶-凝胶法制备氮掺杂炭气凝胶,再对其进行CO_(2)活化。用X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)、X射线光电子光谱法(XPS)和N_(2)吸附等进行物理性能分析,用交流阻抗谱、恒流充放电测试等进行电化学性能测试。随着活化温度的提高,材料表面形成了密集的具有大量孔的内部相互交联的网络结构。当活化温度为900℃时,所制备的样品比表面积最高,由NCAG-4的1194 m^(2)/g增大到CO_(2)-900-NCAG-4的1849 m^(2)/g。在经过活化以后,CO_(2)-900-NCAG-4表现出了最佳的电化学性能,将其组装成超级电容器,充放电循环2000次后电容保持率达94.31%。
With resorcinol,formaldehyde,graphene oxide and melamine as raw materials,the nitrogen doped carbon aerogel was prepared by sol-gel method and activated by CO_(2).XRD,SEM,XPS and N_(2) adsorption were used for physical performance analysis.AC impedance spectroscopy,and constant current charge and discharge test were used for electrochemical performance test.With the increase of the activation temperature,the surface of the material forms the dense and internally cross-linked network structure with a large number of holes.When the activation temperature is 900℃,the specific surface area of the prepared sample is the highest,increasing from 1194 m^(2)/g of NCAG-4 to 1849 m^(2)/g of CO_(2)-900-NCAG-4.After activation,CO_(2)-900-NCAG-4 shows the best electrochemical performance.When it’s assembled into a supercapacitor,after 2000 cycles of charge and discharge,the capacitance retention reaches 94.31%.
作者
戚航
郑迎华
陈锡渠
QI Hang;ZHENG Yinghua;CHEN Xiqu(Department of Automotive Technology,Xinxiang Institute of Vocational Technology,Xinxiang Henan 453000,China;College of Continuing Education,Henan Institute of Science and Technology,Xinxiang Henan 453000,China)
出处
《电源技术》
CAS
北大核心
2022年第2期149-152,共4页
Chinese Journal of Power Sources
关键词
氮掺杂
二氧化碳活化
比表面积
电化学性能
超级电容器
nitrogen doping
carbon dioxide activation
specific surface area
electrochemical performance
supercapacitor
