新型炭材料2022，Vol.37Issue(4)：707-715,9.DOI:10.1016/S1872-5805(22)60595-X
高性能超级电容器用N/S共掺杂多孔炭纳米片电极材料
N/S co-doped interconnected porous carbon nanosheets as high-performance supercapacitor electrode materials
摘要
Abstract
The synthesis of porous carbon nanosheets without acid treatment for high-performance supercapacitors (SCs) is diffi-cult. We report the construction of N/S co-doped porous carbon nanosheets (NS-PCNs) from coal tar pitch (CTP), using Na2S2O3·5H2O as the sulfur source and K2CO3 as an activator, under flowing ammonia at high temperature. NS-IPCN800 prepared at 800 °C is composed of two-dimensional (2D) nanosheets with abundant pores and an interconnected 3D carbon skeleton. The abund-ant microspores increase the number of active sites for electrolyte ion adsorption and small mesopores act as channels for fast ion transmission. The 3D carbon skeleton provides paths for electron conduction. Heteroatom doping provides an additional pseudocapa-citance for the NS-IPCN electrodes. As a result the NS-IPCN800 electrode has a high capacitance of 302 F g?1 at 0.05 A g?1 in a 6 mol L?1 of KOH electrolyte, and has a high energy density of 9.71 Wh kg?1 at a power density of 25.98 W kg?1. It also has excel-lent cycling stability with a capacitance retention of over 94.2％ after 10000 charge-discharge cycles. This work suggests an environ-mentally friendly way to produce NS-IPCNs from CTP for use as high-performance SC electrode materials.关键词
煤焦油沥青/N/S共掺杂相互连接的多孔炭纳米片/分级孔/超级电容器Key words
Coal tar pitch/N/S co-doped interconnected porous carbon nanosheets/Hierarchical pores/Supercapacitor分类
化学化工引用本文复制引用
魏雨晨,周健,杨磊,顾敬,陈志鹏,何孝军..高性能超级电容器用N/S共掺杂多孔炭纳米片电极材料[J].新型炭材料,2022,37(4):707-715,9.基金项目
国家自然科学基金(52072002,51872005,U1710116和U1508201)和皖江学者项目资助.The authors acknowledge the financial support from the National Natural Science Foundation of China (52072002,51872005,U1710116 and U1508201)and the WanJiang Scholar Program. （52072002,51872005,U1710116和U1508201）
