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Effect of pore size and its dispersity on the energy storage in nanoporous supercapacitors
Journal article   Peer reviewed

Effect of pore size and its dispersity on the energy storage in nanoporous supercapacitors

S Kondrat, C. R Prez, V Presser, Y Gogotsi and A. A Kornyshev
Energy & environmental science, v 5(4), pp 6474-6479
21 Mar 2012
DOI: https://doi.org/10.1039/c2ee03092f
Featured in Collection :   UN Sustainable Development Goals @ Drexel

Abstract

This paper focuses on the choice of the optimal pore size and the effect of pore size dispersion, which is important for the rational design of nanoporous supercapacitors. Optimization of the pore size of nanoporous carbon electrodes is discussed in terms of the maximal stored energy density. By applying a previously developed theory, and supporting it by newly performed experiments, we find that the energy density is a non-monotonic function of the pore size of monodisperse porous electrodes. The optimal pore size that provides the maximal energy density increases with increasing operating voltage and saturates at high voltages. We also analyse how the pore size distribution affects the voltage dependent capacitance and the stored energy density, and show that the latter is maximized for monodisperse electrodes. A narrow pore size distribution and controlled pore width are required to increase the energy density of nanoporous carbon supercapacitors.

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475 citations in Web of Science
479 citations in Scopus

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Chemistry, Multidisciplinary
Energy & Fuels
Engineering, Chemical
Environmental Sciences
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