Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior
Single-wall carbon nanotubes/polypyrrole (SWCNT/PPy) composite thin-film electrodes were prepared by electrodeposition of the pyrrole monomer on a porous network made of SWCNT bundles. Electrode/electrolyte interface, which is intimately related to the pseudocapacitive charge storage behavior, is in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Journal of Composites Science |
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| Online Access: | https://www.mdpi.com/2504-477X/5/1/25 |
| _version_ | 1797411597850771456 |
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| author | Freddy Escobar-Teran Hubert Perrot Ozlem Sel |
| author_facet | Freddy Escobar-Teran Hubert Perrot Ozlem Sel |
| author_sort | Freddy Escobar-Teran |
| collection | DOAJ |
| description | Single-wall carbon nanotubes/polypyrrole (SWCNT/PPy) composite thin-film electrodes were prepared by electrodeposition of the pyrrole monomer on a porous network made of SWCNT bundles. Electrode/electrolyte interface, which is intimately related to the pseudocapacitive charge storage behavior, is investigated by using coupled electrogravimetric methods (electrochemical quartz crystal microbalance (EQCM) and its coupling with electrochemical impedance spectroscopy, <i>Ac</i>-electrogravimetry), in a 0.5 M NaCl electrolyte (pH = 7). Our results show that the range of usable potential is greater for composite SWCNT/PPy films than for SWCNT films, which should allow a higher storage capacity to be obtained. This effect is also confirmed by mass variation measurements via EQCM. The mass change (corresponding to the amount of (co)electroadsorbed species) obtained with composite SWCNT/PPy films is four times greater than that observed for pristine SWCNT films if the same potential range is examined. The permselectivity is also greatly improved in the case of composite SWCNT/PPy films compared to SWCNT films; the former shows mainly cation exchange preference. The quantities of anions estimated by <i>Ac</i>-electrogravimetric measurements are much lower in the case of composites. This corroborates the better permselectivity of these composite SWCNT/PPy films even with a moderate amount of PPy. |
| first_indexed | 2024-03-09T04:48:24Z |
| format | Article |
| id | doaj.art-f8271f9e286a48a0aae6f25e36438e73 |
| institution | Directory Open Access Journal |
| issn | 2504-477X |
| language | English |
| last_indexed | 2024-03-09T04:48:24Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Composites Science |
| spelling | doaj.art-f8271f9e286a48a0aae6f25e36438e732023-12-03T13:13:45ZengMDPI AGJournal of Composites Science2504-477X2021-01-01512510.3390/jcs5010025Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange BehaviorFreddy Escobar-Teran0Hubert Perrot1Ozlem Sel2Laboratoire Interfaces et Systèmes Electrochimiques, LISE, UMR8235, Sorbonne Université, CNRS, F-75005 Paris, FranceLaboratoire Interfaces et Systèmes Electrochimiques, LISE, UMR8235, Sorbonne Université, CNRS, F-75005 Paris, FranceLaboratoire Interfaces et Systèmes Electrochimiques, LISE, UMR8235, Sorbonne Université, CNRS, F-75005 Paris, FranceSingle-wall carbon nanotubes/polypyrrole (SWCNT/PPy) composite thin-film electrodes were prepared by electrodeposition of the pyrrole monomer on a porous network made of SWCNT bundles. Electrode/electrolyte interface, which is intimately related to the pseudocapacitive charge storage behavior, is investigated by using coupled electrogravimetric methods (electrochemical quartz crystal microbalance (EQCM) and its coupling with electrochemical impedance spectroscopy, <i>Ac</i>-electrogravimetry), in a 0.5 M NaCl electrolyte (pH = 7). Our results show that the range of usable potential is greater for composite SWCNT/PPy films than for SWCNT films, which should allow a higher storage capacity to be obtained. This effect is also confirmed by mass variation measurements via EQCM. The mass change (corresponding to the amount of (co)electroadsorbed species) obtained with composite SWCNT/PPy films is four times greater than that observed for pristine SWCNT films if the same potential range is examined. The permselectivity is also greatly improved in the case of composite SWCNT/PPy films compared to SWCNT films; the former shows mainly cation exchange preference. The quantities of anions estimated by <i>Ac</i>-electrogravimetric measurements are much lower in the case of composites. This corroborates the better permselectivity of these composite SWCNT/PPy films even with a moderate amount of PPy.https://www.mdpi.com/2504-477X/5/1/25carbon/polymer compositescarbon nanotubesconducting polymersSWCNTdoped polypyrroleelectrochemical quartz crystal microbalance |
| spellingShingle | Freddy Escobar-Teran Hubert Perrot Ozlem Sel Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior Journal of Composites Science carbon/polymer composites carbon nanotubes conducting polymers SWCNT doped polypyrrole electrochemical quartz crystal microbalance |
| title | Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior |
| title_full | Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior |
| title_fullStr | Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior |
| title_full_unstemmed | Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior |
| title_short | Single Wall Carbon Nanotubes/Polypyrrole Composite Thin Film Electrodes: Investigation of Interfacial Ion Exchange Behavior |
| title_sort | single wall carbon nanotubes polypyrrole composite thin film electrodes investigation of interfacial ion exchange behavior |
| topic | carbon/polymer composites carbon nanotubes conducting polymers SWCNT doped polypyrrole electrochemical quartz crystal microbalance |
| url | https://www.mdpi.com/2504-477X/5/1/25 |
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