Issue 72, 2017, Issue in Progress

Hierarchical porous carbon spheres constructed from coal as electrode materials for high performance supercapacitors

Abstract

Hierarchical porous carbon spheres (PCS) are prepared by a simple one-pot spray pyrolysis of coal oxide solution without any further activation process. The specific surface area and total pore volume of the resultant carbon spheres are increased significantly with the increase of spray pyrolysis temperature. When evaluated as electrode materials for supercapacitors in 6 M KOH electrolyte, the PCS exhibits a high specific capacitance 227 F g−1 at a current density of 1 A g−1 and outstanding cycling stability after 10 000 charge/discharge cycles at a current density of 2 A g−1. In symmetric supercapacitor, the specific capacitance of the sample PCS-8 is 180 F g−1 at a current density of 0.2 A g−1 and has excellent rate capability. The proposed strategy offers a facile and green method to produce porous carbon spheres from coal, and has potential application in energy storage.

Graphical abstract: Hierarchical porous carbon spheres constructed from coal as electrode materials for high performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
20 Jul 2017
Accepted
18 Sep 2017
First published
22 Sep 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 45363-45368

Hierarchical porous carbon spheres constructed from coal as electrode materials for high performance supercapacitors

M. Guo, J. Guo, F. Tong, D. Jia, W. Jia, J. Wu, L. Wang and Z. Sun, RSC Adv., 2017, 7, 45363 DOI: 10.1039/C7RA08026C

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