Polarization-induced distortion of ions in the pores of carbon electrodes for electrochemical capacitors
This paper reports the effect of confining ionic species of the electrolyte inside the porosity of carbon electrodes during the performance of electrochemical capacitors. Solvent-free ionic liquids and a conventional organic medium were used as electrolytes, while two series of carbons with controlled pore sizes – one of them obtained from nanocasting procedure – were used as electrode materials. Our results demonstrate that under the effect of the electric field applied during the polarization of the electrodes, desolvated ions enter distorted in pores smaller than their limiting size. In such conditions of confinement, it is demonstrated that the traditional concept of an electric double-layer formed by solvated ions adsorbed on both pore walls does not apply for sub-nanometer size pores.
Main Authors: | Ovín Ania, María Concepción, Pernak, J., Stefaniak, F., Raymundo-Piñero, Encarnación, Béguin, F. |
---|---|
Format: | artículo biblioteca |
Language: | English |
Published: |
Elsevier
2009-11
|
Subjects: | Electrochemical capacitors, Porous carbon, Electrode materials, |
Online Access: | http://hdl.handle.net/10261/99567 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Solvent-free ionic liquids as in situ probes for assessing the effect of ion size on the performance of electrical double layer capacitors
by: Ovín Ania, María Concepción, et al.
Published: (2006) -
Highly-Durable Carbon Electrode for Electrochemical Capacitors
by: Shiraishi, Soshi
Published: (2013-06) -
On the electrical double-layer capacitance of mesoporous templated carbons
by: Álvarez Centeno, Teresa, et al.
Published: (2005-06) -
An activated carbon monolith as an electrode material for supercapacitors
by: Ruiz Ruiz, Vanesa, et al.
Published: (2009-01) -
Synthesis of MgO templated mesoporous carbons and its use for capacitor electrode
by: Soneda, Yasushi, et al.
Published: (2013-06)