Issue 40, 2014

Expeditious fabrication of flower-like hierarchical mesoporous carbon superstructures as supercapacitor electrode materials

Abstract

We report a facile and efficient strategy for preparing flower-like hierarchical mesoporous carbon superstructures (FMCS) through a one-pot hydrothermal reaction of nickel acetate with glucose. In the fabrication process of FMCS, the nickel acetate ingeniously plays multifunctional roles: as inducer of flower-like hierarchical carbon, as catalyst of graphitization, and as pore-forming agent. First, flower-like Ni(OH)2/polysaccharide microspheres were self-assembled via a hydrothermal reaction at 180 °C for 24 h. Second, flower-like mesoporous carbon superstructures were obtained by etching and removing the Ni from the Ni/C precursor carbonized from the Ni(OH)2/polysaccharide microspheres. The obtained flower-like superstructures are composed of two-dimensional mesoporous carbon petal building blocks, with a thickness of 20 nm. Electrochemical data showed that the product FMCS-1 displayed a specific capacitance of 226 F g−1 at 0.5 A g−1, and retained 82% (185 F g−1) at a high current density of 20 A g−1, indicative of outstanding rate capability. Furthermore, the three-dimensional (3D) flower-like hierarchical mesoporous carbon superstructures demonstrated excellent cycling stability, with approximately 100% retention of the initial specific capacitance after 2000 cycles at a current density of 10 A g−1.

Graphical abstract: Expeditious fabrication of flower-like hierarchical mesoporous carbon superstructures as supercapacitor electrode materials

Supplementary files

Article information

Article type
Paper
Submitted
24 6 2014
Accepted
12 8 2014
First published
12 8 2014

J. Mater. Chem. A, 2014,2, 16884-16891

Author version available

Expeditious fabrication of flower-like hierarchical mesoporous carbon superstructures as supercapacitor electrode materials

J. Liang, S. Chen, M. Xie, Y. Wang, X. Guo, X. Guo and W. Ding, J. Mater. Chem. A, 2014, 2, 16884 DOI: 10.1039/C4TA03209H

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