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Issue 15, 2014
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Shape-controlled porous nanocarbons for high performance supercapacitors

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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

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Publication details

The article was received on 17 Dec 2013, accepted on 22 Jan 2014 and first published on 22 Jan 2014


Article type: Paper
DOI: 10.1039/C3TA15245F
Citation: J. Mater. Chem. A, 2014,2, 5236-5243
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    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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