Anisometric charge dependent swelling of porous carbon in an ionic liquid
In situ electrochemical dilatometry was used to study, for the first time, the expansion behavior of a porous carbon electrode in a pure ionic liquid, 1-ethyl-3-methyl-imidazolium-tetrafluoroborate. For a single electrode, an applied potential of − 2 V and + 2 V against the potential of zero charge...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/101159 |
| _version_ | 1811095068305522688 |
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| author | Kaasik, F. Tamm, T. Perre, E. Aabloo, A. Lust, E. Presser, V. Bazant, Martin Z. Hantel, M. M. |
| author2 | Massachusetts Institute of Technology. Department of Chemical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Chemical Engineering Kaasik, F. Tamm, T. Perre, E. Aabloo, A. Lust, E. Presser, V. Bazant, Martin Z. Hantel, M. M. |
| author_sort | Kaasik, F. |
| collection | MIT |
| description | In situ electrochemical dilatometry was used to study, for the first time, the expansion behavior of a porous carbon electrode in a pure ionic liquid, 1-ethyl-3-methyl-imidazolium-tetrafluoroborate. For a single electrode, an applied potential of − 2 V and + 2 V against the potential of zero charge resulted in maximum strains of 1.8% and 0.5%, respectively. During cyclic voltammetry, the characteristic expansion behavior strongly depends on the scan rate, with increased scan rates leading to a decrease of the expansion. Chronoamperometry was used to determine the equilibrium specific capacitance and expansion. The obtained strain versus accumulated charge relationship can be fitted with a simple quadratic function. Cathodic and anodic expansion data collapse on one parabola when normalizing the surface charge by the ratio of ion volume and average pore size. There is also a transient spike in the height change when polarity is switched from positive to negative that is not observed when changing the potential from negative to positive indicating the size and the shape of the ion is influencing the expansion behavior. |
| first_indexed | 2024-09-23T16:10:07Z |
| format | Article |
| id | mit-1721.1/101159 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:10:07Z |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1011592022-09-29T18:40:58Z Anisometric charge dependent swelling of porous carbon in an ionic liquid Kaasik, F. Tamm, T. Perre, E. Aabloo, A. Lust, E. Presser, V. Bazant, Martin Z. Hantel, M. M. Massachusetts Institute of Technology. Department of Chemical Engineering Bazant, Martin Z. Bazant, Martin Z. In situ electrochemical dilatometry was used to study, for the first time, the expansion behavior of a porous carbon electrode in a pure ionic liquid, 1-ethyl-3-methyl-imidazolium-tetrafluoroborate. For a single electrode, an applied potential of − 2 V and + 2 V against the potential of zero charge resulted in maximum strains of 1.8% and 0.5%, respectively. During cyclic voltammetry, the characteristic expansion behavior strongly depends on the scan rate, with increased scan rates leading to a decrease of the expansion. Chronoamperometry was used to determine the equilibrium specific capacitance and expansion. The obtained strain versus accumulated charge relationship can be fitted with a simple quadratic function. Cathodic and anodic expansion data collapse on one parabola when normalizing the surface charge by the ratio of ion volume and average pore size. There is also a transient spike in the height change when polarity is switched from positive to negative that is not observed when changing the potential from negative to positive indicating the size and the shape of the ion is influencing the expansion behavior. 2016-02-11T02:30:11Z 2016-02-11T02:30:11Z 2013-06 2013-06 Article http://purl.org/eprint/type/JournalArticle 13882481 http://hdl.handle.net/1721.1/101159 Kaasik, F., T. Tamm, M.M. Hantel, E. Perre, A. Aabloo, E. Lust, M.Z. Bazant, and V. Presser. “Anisometric Charge Dependent Swelling of Porous Carbon in an Ionic Liquid.” Electrochemistry Communications 34 (September 2013): 196–99. en_US http://dx.doi.org/10.1016/j.elecom.2013.06.011 Electrochemistry Communications Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Bazant via Erja Kajosalo |
| spellingShingle | Kaasik, F. Tamm, T. Perre, E. Aabloo, A. Lust, E. Presser, V. Bazant, Martin Z. Hantel, M. M. Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title | Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title_full | Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title_fullStr | Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title_full_unstemmed | Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title_short | Anisometric charge dependent swelling of porous carbon in an ionic liquid |
| title_sort | anisometric charge dependent swelling of porous carbon in an ionic liquid |
| url | http://hdl.handle.net/1721.1/101159 |
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