Issue 14, 2015

Synthesis of nitrogen-doped carbon cellular foam with ultra-high rate capability for supercapacitors

Abstract

Three-dimensional (3D) interconnected N-doped porous carbons (NPCs) with different levels of pore structure are synthesized by a template method using MnOx as template and N-enriched pyrrole as carbon source. The fabricated materials show favorable pore size distribution in the range about 3–4 nm and moderate nitrogen content changing from 0.94 to 1.63 at%. Used as electrode material, the NPC originated from the optimum pyrolysis temperature of 750 °C demonstrates the best capacitance performance with a high specific capacitance of about 239.30 F g−1 at 0.5 A g−1. Moreover, it reveals an outstanding rate capability and the specific capacitance reaches 212.90 F g−1 at 10.0 A g−1 (up to 88.97% capacitance retention), as well as excellent cycling stability (∼10% capacitance loss after 5000 cycles) tested in 6 M KOH aqueous solution. Such exquisite performance may be ascribed to a unique combination of high specific surface area, suitable pore size distribution and introduction of nitrogen atoms.

Graphical abstract: Synthesis of nitrogen-doped carbon cellular foam with ultra-high rate capability for supercapacitors

Article information

Article type
Paper
Submitted
12 Nov 2014
Accepted
07 Jan 2015
First published
07 Jan 2015

RSC Adv., 2015,5, 10296-10303

Synthesis of nitrogen-doped carbon cellular foam with ultra-high rate capability for supercapacitors

Z. Du, Y. Peng, Z. Ma, C. Li, J. Yang, X. Qin and G. Shao, RSC Adv., 2015, 5, 10296 DOI: 10.1039/C4RA14395G

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