Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 2, Issue 23, Pages 8859-8867Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta01038h
Keywords
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Funding
- National Natural Science Foundation of China [51273061]
- Program for New Century Excellent Talents in University [NCET-10-0372]
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Nitrogen-doped porous graphene/carbon (NPGC) framework electrode materials have been synthesized via chemical activation of graphene oxide/polypyrrole (GOP) composites with KOH. The effects of the mass ratio of KOH/GOP and activation temperature on the electrochemical performance of NPGC have been discussed. It is found that the NPGC prepared by activating GOP (GO : Py = 1 : 40) with 3.5 times mass of KOH at 650 degrees C (NPGC650) exhibits the highest specific capacitance of 405 F g(-1) at a current density of 0.2 A g(-1). Particularly, the specific capacitance still remains at 249 F g(-1) even at a current density as high as 10 A g(-1). Moreover, 96% of the capacitance can be retained after 1000 cycles even under a high operation current of 10 A g(-1). The present work provides a novel strategy to synthesize NGPC electrode material for supercapacitors.
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