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Cited by 253

The DOI matches its Crossref record; 41 of the 41 references it cites were found in a registry or an index.

On the Dynamics of Charging in Nanoporous Carbon-Based Supercapacitors

Open access
Péan, Clarisse, Merlet, Céline, Rotenberg, Benjamin, Madden, Paul Anthony, Taberna, Pierre-Louis, Daffos, Barbara, Salanne, Mathieu, Simon, Patrice·2014·ACS Nano

Abstract

Supercapacitors are electricity storage systems with high power performances. Their short charge/discharge times are due to fast adsorption/desorption rates for the ions of the electrolyte on the electrode surface. Nanoporous carbon electrodes, which give larger capacitances than simpler geometries, might be expected to show poorer power performances because of the longer times taken by the ions to access the electrode interior. Experiments do not show such trends, however, and this remains to be explained at the molecular scale. Here we show that carbide-derived carbons exhibit heterogeneous and fast charging dynamics. We perform molecular dynamics simulations, with realistically modeled nanoporous electrodes and an ionic liquid electrolyte, in which the system, originally at equilibrium in the uncharged state, is suddenly perturbed by the application of an electric potential difference between the electrodes. The electrodes respond by charging progressively from the interface to the bulk as ions are exchanged between the nanopores and the electrolyte region. The simulation results are then injected into an equivalent circuit model, which allows us to calculate charging times for macroscopic-scale devices.

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Metadata

Authors
Péan, C., Merlet, C., Rotenberg, B., Madden, P. A., Taberna, P.-L., Daffos, B., Salanne, M., & Simon, P.
Venue
ACS Nano
Published
2014-01-15
Volume
8
Issue
2
Pages
1576-1583
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W1998873401
Cited by
253
References
41
FWCI
7.74
Type
journal article
Language
en
Open access
green

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