Preparation of nitrogen-doped biomass porous carbon materials and its application in supercapacitors
Nitrogen-doped biomass porous carbon(N-PBCs)were successfully prepared by pyrolysis and activation method using carbonized cellulose as substrate,KOH as activator and urea as dopant.It was demonstrated by a series of characterization that the prepared N-PBCs electrode materials had good pore structure and a large number of defect structures.In addition,the highest specific capacitance of the aqueous symmetric supercapacitor based on N-PBCs reached 230.1F·g-1(0.3A·g-1).When the current density increases to 10A·g-1,the specific capacitance retention rate is still as high as 84.7％.This provides a new idea for the next generation of new energy storage devices.
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