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Issue 82, 2016, Issue in Progress

Graphene supported nitrogen-doped porous carbon nanosheets derived from zeolitic imidazolate framework for high performance supercapacitors

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Abstract

A nitrogen-doped porous carbon nanosheet/graphene composite (NPCN/G) with layer-by-layer structure is facilely synthesized on a large scale via pyrolysis of a zeolitic imidazolate framework (ZIF-8)/graphene (2D) mixture. The as-prepared NPCN/G owns a high Brunauer–Emmett–Teller (BET) specific surface area (1210 m2 g−1) and nitrogen content (6.1%). The specific capacitance of NPCN/G in 6 M KOH solution reaches 306.4 F g−1 at a current density of 0.2 A g−1. Moreover, NPCN/G exhibits an outstanding cycle stability with 97.4% capacitance preservation after 3500 cycles at a current density of 5 A g−1. Compared to the nitrogen-doped porous carbon nanosheets (NPCN), NPCN/G shows a higher capacitance and a superior cycle stability which can be ascribed to the synergistic effect between the GO nanosheets and carbon nanosheets. In addition, the specific capacitance of NPCN/G enhances with increasing concentration of electrolyte.

Graphical abstract: Graphene supported nitrogen-doped porous carbon nanosheets derived from zeolitic imidazolate framework for high performance supercapacitors

Supplementary files

Article information


Submitted
17 Jun 2016
Accepted
30 Jul 2016
First published
19 Aug 2016

RSC Adv., 2016,6, 78947-78953
Article type
Paper

Graphene supported nitrogen-doped porous carbon nanosheets derived from zeolitic imidazolate framework for high performance supercapacitors

Q. Gan, S. Liu, K. Zhao, Y. Wu, Z. He and Z. Zhou, RSC Adv., 2016, 6, 78947 DOI: 10.1039/C6RA15776A

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