摘要
在保持快速充/放电特性的同时,提高超级电容器的能量密度将极大地扩展其应用领域。本文以野生箩藦壳为碳源、ZnCl2为活化剂、NH4Cl为氮源,通过一步法制备了氮掺杂层状多孔炭(NPCM)作为高性能超级电容器电极材料。该NPCM材料具有高的电导率、较高的离子可接触比表面积和快速的离子传输通道,显示出高质量比容量(457 F/g)和面积比容量(47.8μF/cm^2)。在高负载(17.7 mg/cm^2)下,材料仍显示出较高比容量(161 F/g)。此外,在1 mol/L Na2SO4电解液下,组装的NPCM//NPCM对称超级电容器可以在0.56 s内输出高能量密度(12.5 Wh/kg)和超高的功率密度(80 kW/kg)。
We report a porous carbon material(NPCM)with a high N content as a high-performance supercapacitor electrode material which was prepared by a simple activation-doping process using Metaplexis Japonica shell as the carbon precursor,ammonium chloride as the nitrogen source and zinc chloride as the activation agent.Its high electrical conductivity,large ion-accessible surface area and fast ion transport ability make it possible to achieve a high mass loading of NPCM per area of the electrode and a high energy and high power density supercapacitor.An electrode with a low NPCM mass loading of 1 mg cm^-2 has a gravimetric specific capacitance of 457 F g^−1 and an areal specific capacitance of 47.8μF cm^-2.At a much high NPCM loading of 17.7 mg cm^-2 it has a high gravimetric capacitance of 161 F g^−1.Furthermore,an assembled NPCM//NPCM symmetric supercapacitor with an optimal NPCM loading of 12.3 mg cm^-2 delivered a high specific energy of 12.5 Wh kg^−1 at an ultrahigh power of 80 kW kg^−1 in 1 mol L-1 Na2SO4.The achievement of such high-energy and high-power densities using NPCM will open exciting opportunities for carbon-based supercapacitors in many different applications.
作者
盛利志
赵云云
侯宝权
肖振鹏
江丽丽
范壮军
SHENG Lizhi;ZHAO Yunyun;HOU Baoquan;XIAO Zhenpeng;JIANG Lili;FAN Zhuangjun(Wood Material Science and Engineering Key Laboratory of Jilin Province,Beihua University,Jilin City 132013,P.R.China;Key Laboratory for Special Functional Materials in Jilin Provincial Universities,Jilin Institute of Chemical Technology,Jilin City 132022,P.R.China;School of Materials Science and Engineering,China University of Petroleum,Qingdao 266580,P.R.China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2021年第1期179-188,共10页
New Carbon Materials
基金
中国国家自然科学基金(51902006,51702117,51672055,51972342)
山东省泰山学者项目(ts20190922)
山东省重大项目(ZR2019ZD51)
吉林省科学技术厅(20190103034JH,20180520014JH)
吉林省青年人才托举工程(192009)
吉林省教育厅(JJKH2021KJ).
关键词
超级电容器
多孔炭
氮掺杂炭
高功率
Supercapacitors
Porous carbon
N-doped carbon
High power
