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. © 2014 the Partner Organisations.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors thank for the characterization facilities provided by KAUST Advanced Imaging and Characterization Laboratory and Analytic Core Laboratory. We acknowledge the help from Olga Zausalina for the illustrations. W. C. acknowledges the KAUST Graduate Fellowship. R. B. R. acknowledges the SABIC Post-doctoral Fellowship, and H.N.A. acknowledges the support from KAUST baseline fund.
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)