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High performance nitrogen-doped porous graphene/carbon frameworks for supercapacitors
- Source :
- Journal of Materials Chemistry A. 2:8859
- Publication Year :
- 2014
- Publisher :
- Royal Society of Chemistry (RSC), 2014.
-
Abstract
- 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 °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.
- Subjects :
- Supercapacitor
Materials science
Renewable Energy, Sustainability and the Environment
Graphene
Oxide
chemistry.chemical_element
Nanotechnology
General Chemistry
Electrochemistry
Polypyrrole
Capacitance
law.invention
chemistry.chemical_compound
chemistry
Chemical engineering
law
General Materials Science
Current density
Carbon
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry A
- Accession number :
- edsair.doi...........446aa8ec959216d7329977901714682d