Diffusion-bonded CNT carpets for fundamental CDI studies
Uncertainty about future energy and water supplies suggests a pressing need to develop efficient technologies for water desalination. Capacitive deionization (CDI), a method that captures ions in the electrical double layer (EDL) of an electrochemical capacitor, is a promising technology that can po...
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| Format: | Article |
| Language: | en_US |
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Cambridge University Press
2013
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| Online Access: | http://hdl.handle.net/1721.1/79782 https://orcid.org/0000-0002-6420-1616 https://orcid.org/0000-0003-4891-5560 https://orcid.org/0000-0002-0121-8285 https://orcid.org/0000-0001-7045-1200 |
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| author | Enright, Ryan Mitchell, R. Lv, C. Mutha, Heena K. Christiansen, Michael Gary Thompson, Carl V. Wang, Evelyn N. |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Enright, Ryan Mitchell, R. Lv, C. Mutha, Heena K. Christiansen, Michael Gary Thompson, Carl V. Wang, Evelyn N. |
| author_sort | Enright, Ryan |
| collection | MIT |
| description | Uncertainty about future energy and water supplies suggests a pressing need to develop efficient technologies for water desalination. Capacitive deionization (CDI), a method that captures ions in the electrical double layer (EDL) of an electrochemical capacitor, is a promising technology that can potentially fulfill those requirements. Similar to supercapacitors, ideal CDI electrodes should have a large electrolyte-accessible specific surface area available for ion adsorption with rapid charging/discharging characteristics. Unlike supercapacitors, CDI electrodes are required to operate in aqueous electrolytes with low ionic concentrations in a non-linear charging regime. To explore this practically and theoretically important regime, we developed robust, electrochemically-compatible carbon nanotube (CNT) carpet electrodes that posses a well-defined and uniform pore structure that is more readily analyzed in comparison to the random and multi-scale pore structure of typical carbon electrodes. The fabricated electrodes were characterized using cyclic voltammetry and potentiostatic charging in aqueous NaCl solutions (n[subscript o] = 20 - 90 mM) using a three electrode setup. Examination of the CV and potentiostatically-measured capacitances were consistent with EDL behavior dictated by the Stern layer. However, some deviations from the expected behavior were observed with increasing salt concentration during potentiostatic testing. |
| first_indexed | 2024-09-23T09:00:22Z |
| format | Article |
| id | mit-1721.1/79782 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:00:22Z |
| publishDate | 2013 |
| publisher | Cambridge University Press |
| record_format | dspace |
| spelling | mit-1721.1/797822022-09-30T12:45:01Z Diffusion-bonded CNT carpets for fundamental CDI studies Enright, Ryan Mitchell, R. Lv, C. Mutha, Heena K. Christiansen, Michael Gary Thompson, Carl V. Wang, Evelyn N. Massachusetts Institute of Technology. Department of Materials Science and Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Mitchell, R. Enright, Ryan Mutha, Heena K. Lv, C. Christiansen, Michael Gary Thompson, Carl V. Wang, Evelyn N. Uncertainty about future energy and water supplies suggests a pressing need to develop efficient technologies for water desalination. Capacitive deionization (CDI), a method that captures ions in the electrical double layer (EDL) of an electrochemical capacitor, is a promising technology that can potentially fulfill those requirements. Similar to supercapacitors, ideal CDI electrodes should have a large electrolyte-accessible specific surface area available for ion adsorption with rapid charging/discharging characteristics. Unlike supercapacitors, CDI electrodes are required to operate in aqueous electrolytes with low ionic concentrations in a non-linear charging regime. To explore this practically and theoretically important regime, we developed robust, electrochemically-compatible carbon nanotube (CNT) carpet electrodes that posses a well-defined and uniform pore structure that is more readily analyzed in comparison to the random and multi-scale pore structure of typical carbon electrodes. The fabricated electrodes were characterized using cyclic voltammetry and potentiostatic charging in aqueous NaCl solutions (n[subscript o] = 20 - 90 mM) using a three electrode setup. Examination of the CV and potentiostatically-measured capacitances were consistent with EDL behavior dictated by the Stern layer. However, some deviations from the expected behavior were observed with increasing salt concentration during potentiostatic testing. Center for Clean Water and Clean Energy at MIT and KFUPM 2013-08-05T16:26:38Z 2013-08-05T16:26:38Z 2012-04 Article http://purl.org/eprint/type/JournalArticle 1946-4274 http://hdl.handle.net/1721.1/79782 Enright, R., R. Mitchell, H. Mutha, C. Lv, M. Christiansen, C. V. Thompson, and E. N. Wang. “Diffusion-bonded CNT carpets for fundamental CDI studies.” MRS Proceedings 1407 (January 12, 2012). Copyright © Materials Research Society 2012 https://orcid.org/0000-0002-6420-1616 https://orcid.org/0000-0003-4891-5560 https://orcid.org/0000-0002-0121-8285 https://orcid.org/0000-0001-7045-1200 en_US http://dx.doi.org/10.1557/opl.2012.707 MRS Proceedings Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Cambridge University Press MIT web domain |
| spellingShingle | Enright, Ryan Mitchell, R. Lv, C. Mutha, Heena K. Christiansen, Michael Gary Thompson, Carl V. Wang, Evelyn N. Diffusion-bonded CNT carpets for fundamental CDI studies |
| title | Diffusion-bonded CNT carpets for fundamental CDI studies |
| title_full | Diffusion-bonded CNT carpets for fundamental CDI studies |
| title_fullStr | Diffusion-bonded CNT carpets for fundamental CDI studies |
| title_full_unstemmed | Diffusion-bonded CNT carpets for fundamental CDI studies |
| title_short | Diffusion-bonded CNT carpets for fundamental CDI studies |
| title_sort | diffusion bonded cnt carpets for fundamental cdi studies |
| url | http://hdl.handle.net/1721.1/79782 https://orcid.org/0000-0002-6420-1616 https://orcid.org/0000-0003-4891-5560 https://orcid.org/0000-0002-0121-8285 https://orcid.org/0000-0001-7045-1200 |
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