Issue 12, 2014

Creation of nanopores on graphene planes with MgO template for preparing high-performance supercapacitor electrodes

Abstract

Creation of nanopores on graphene planar sheets is of great significance in promoting the kinetic diffusion of electrolyte and enhancing the utilization efficiency of graphene planar sheets. Herein, we developed a facile chemical vapor deposition strategy to prepare highly porous graphene with flake-like MgO as template and ferrocene as the carbon precursor. The graphene layers show a highly porous structure with small mesopores of 4–8 nm, large mesopores of 10–20 nm and additional macropores of 100–200 nm. These nanopores on graphene sheets provide numerous channels for fast ion transport perpendicular to the 2D basal plane, while the good powder conductivity ensures an effective electron propagation within the 2D graphene plane. As a result, a specific capacitance of 303 F g−1, an areal capacitance up to 17.3 μF cm−2 and a nearly tenfold shorter time constant were achieved when compared with those of nonporous and stacked graphene electrodes. The method demonstrated herein would open up an opportunity to prepare porous graphene for a wide applications in energy storage, biosensors, nanoelectronics and catalysis.

Graphical abstract: Creation of nanopores on graphene planes with MgO template for preparing high-performance supercapacitor electrodes

Supplementary files

Article information

Article type
Paper
Submitted
27 Jan 2014
Accepted
11 Mar 2014
First published
13 Mar 2014

Nanoscale, 2014,6, 6577-6584

Author version available

Creation of nanopores on graphene planes with MgO template for preparing high-performance supercapacitor electrodes

H. Wang, X. Sun, Z. Liu and Z. Lei, Nanoscale, 2014, 6, 6577 DOI: 10.1039/C4NR00538D

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