화학공학소재연구정보센터
Electrochimica Acta, Vol.250, 16-24, 2017
A simple synthetic route of N-doped mesoporous carbon derived from casein extracted with cobalt ions for high rate performance supercapacitors
Nitrogen-doped mesoporous carbon (NMC) was synthesized via pyrolysis of cobalt-containing casein obtained by extraction from pure milk with the auxiliary of cobalt ions. The cobalt element in casein promoted specific surface area and N element doping amount of casein-derived porous carbon. The N-doped porous carbon obtained by carbonization at 800 degrees C (NPC-800) possessed a specific surface area of similar to 886.7 m(2) g(-1), and the mesoporous size was centered at 2.7 and 7 nm. X-ray photoelectron spectroscopy analysis showed that the nitrogen content of NPC-800 was 3.29 at%. The NPC-800 was explored as a symmetric supercapacitor, which exhibited specific capacity of 380 F g(-1) at a current density of 0.5 A g(-1), 218 F g(-1) at a current density of 20 A g(-1), and high capacitance retention of 91.3% after charging/discharging 5,000 cycles. (C) 2017 Elsevier Ltd. All rights reserved.