A Facile Synthesis of Nitrogen-Doped Porous Carbon Materials for High-Performance Supercapacitors

摘要

A simple way for N-doped porous carbon materials(ANCs)was prepared in N2 atmosphere through the KOH-assisted carbonization of commercial melamine foam(MF)attached glucose.Adding glucose and KOH activation process have great effects on improving the electrochemical properties of ANCs materials.Compared with other materials,the optimal ANCs-800,which is obtained with a KOH/glucose/MF weight ratio of 5:20:1 at 800 °C,exhibits the best capacitance performance with the specific surface area(SSA)of 1481 m~2g~(-1)and high nitrogen content of 3.7 at.%.It possesses prominent specific capacitance(387 F g~(-1)at 0.5 A g~(-1))and excellent cycling stability(98.6% retention after 10,000 cycles).Furthermore,in the symmetric supercapacitor,the ANCs-800 electrode material maintains high energy density(24.2 W h kg~(-1)at 701.07 W kg~(-1))and great cycling performance(96.3% after 10,000 cycles).Accordingly,the facile synthetic approach and attractive electroche