Chen Yinan, Hao Huilian, Lu Xuekun, Li Wenyao, He Guanjie, Shen Wenzhong, Shearing Paul R, Brett Dan J L
College of Material Engineering, Shanghai University of Engineering Science 333 Long Teng Road, Shanghai 201620, People's Republic of China.
Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, London WC1E 7JE, United Kingdom.
Nanotechnology. 2021 May 7;32(19):195405. doi: 10.1088/1361-6528/abdf8d.
Heteroatom-doped carbon materials with a high specific area, a well-defined porous structure is important to high-performance supercapacitors (SCs). Here, S and N co-doped three-dimensional porous graphene aerogel (NS-3DPGHs) have been synthesized in a facile and efficient self-assembly process with thiourea acting as the reducing and doping agent solution. Operating as a SC electrode, fabricated co-doping graphene, i.e. the sample of NS-3DPGH-150 exhibits the highest specific capacitance of 412.9 F g under 0.5 A g and prominent cycle stabilization with 96.4% capacitance retention in the back of 10 000 cycles. Furthermore, based on NS-3DPGH-150, the symmetrical supercapacitor as-prepared in 6 M KOH displays a superior energy density of 12.9 Wh kg under the power density of 249 W kg. Hence, NS-3DPGHs could be considered as an excellent candidate for SCs.
具有高比表面积和明确多孔结构的杂原子掺杂碳材料对于高性能超级电容器（SCs）至关重要。在此，通过一种简便高效的自组装过程合成了S和N共掺杂的三维多孔石墨烯气凝胶（NS-3DPGHs），其中硫脲用作还原剂和掺杂剂溶液。作为SC电极，制备的共掺杂石墨烯，即NS-3DPGH-150样品在0.5 A g下表现出最高比电容412.9 F g，并且在10000次循环后具有96.4%的电容保持率，具有出色的循环稳定性。此外，基于NS-3DPGH-150，在6 M KOH中制备的对称超级电容器在249 W kg的功率密度下显示出12.9 Wh kg的优异能量密度。因此，NS-3DPGHs可被视为SCs的优秀候选材料。
