Issue 15, 2014

Shape-controlled porous nanocarbons for high performance supercapacitors

Abstract

Porous activated nanocarbons with well-controlled dimensionality and morphology (i.e. 0D activated carbon nanoparticles, 1D activated carbon nanotubes, and 2D activated carbon nanosheets) were derived successfully from different template-induced polyaniline nanostructures by facile carbonization and activation processes. The obtained nanocarbons show large specific surface areas (1332–2005 m2 g−1), good conductivities, and highly porous nanoscale architectures. The supercapacitors fabricated using the shape-controlled nanocarbons exhibit high specific capacitance, excellent rate capability, and superior long-term cycling stability in both aqueous and ionic liquid electrolytes. More importantly, a very high energy density of 50.5 W h kg−1 with a power density of 17.4 kW kg−1 can be obtained from the activated carbon nanotube based supercapacitors in an ionic liquid electrolyte (with a charge time of ∼10 s), making the shape-controlled nanocarbons promising candidates for high-performance energy storage devices.

Graphical abstract: Shape-controlled porous nanocarbons for high performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
17 Dec 2013
Accepted
22 Jan 2014
First published
22 Jan 2014

J. Mater. Chem. A, 2014,2, 5236-5243

Shape-controlled porous nanocarbons for high performance supercapacitors

W. Chen, R. B. Rakhi, M. N. Hedhili and H. N. Alshareef, J. Mater. Chem. A, 2014, 2, 5236 DOI: 10.1039/C3TA15245F

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