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Nanostructuring Polyaniline Using Non-Substituted Imidazolium-Based Ionic liquid as Polymerization Medium Enabling Faster Supercapacitor Operation
Fatima Al Zohbi1, Fouad Ghamouss2, Bruno Schmaltz1, Mohamed Abarbri1, Khalil Cherry3, Mohamad fadel Tabcheh4 and François Tran Van1*
1Laboratoire de Physico-Chimie des Matériaux et des Electrolytes Pour l’Energie (EA 6299), University of Tours , Parc de Grandmont 37200 Tours, France
2Materials Science and Nano-engineering, Mohammed VI Polytechnic University, Lot 660 Hay Moulay Rachid, Ben Guerir, Morocco
3Laboratoire Matériaux, Catalyse, Environnement et Méthodes Analytiques (MCEMA) Campus Universitaire de Hadath, Liban
4Laboratoire de chimie appliquée, Faculté des sciences III, Universite Libanaise, Kobbeh - Tripoli – Liban
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Abstract:
Non-substituted imidazolium-based protic ionic liquid, namely imidazolium hydrogen sulfate [Imi][HSO4], has been investigated as a polymerization medium for PANI (designated as PANI/PIL). The resulting material was then investigated as electrode materials for supercapacitors. [Imi][HSO4] was prepared via a one-step acid-base reaction, and its structure was confirmed by 1H NMR. [Imi][HSO4] displayed full miscibility with water owing to the charge density distribution of its ions. Furthermore, the binary mixture [Imi][HSO4]/water is highly acid (e.g. pH ~ 0.1 for [Imi][HSO4]/water in a weight ratio of 70/30). As the polymerization medium for PANI/PIL, [Imi][HSO4] plays the role of a soft template agent and induces nanostructured PANI formation with fibrillar morphology (as shown by SEM images) without affecting the typical structure of PANI (as confirmed by FT-IR analysis). Furthermore, PANI/PIL was obtained in emeraldine salt form without any undesirable byproduct. Moreover, the electrical conductivity was seven times superior to that of the conventional PANI (i.e. PANI/HCl) when measured by the four-probe technique of PANI/PIL (~ 21.8 S/cm). This improvement in the PANI/PIL’s electrical conductivity of as well as the fibrillar morphology of PANI/PIL positively influences its electrochemical performances and highlights the suitability of [Imi][HSO4] as a polymerization medium for PANI material.
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Keywords: Polyaniline, Protic ionic liquids, Polymerization medium, Supercapacitors
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Received:June 29, 2022; Revised:July 16, 2022; Accepted:July 29, 2022; Published:September 30, 2022
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*Corresponding author; e-mail: francois.tran@univ-tours.fr
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Citation:Al, F.; Ghamouss, F.; Schmaltz, B.; Abarbri, M.; Cherry, K.; fadel, M.; Tran, F.Nanostructuring Polyaniline Using Non-Substituted Imidazolium-Based Ionic liquid as Polymerization Medium Enabling Faster Supercapacitor Operation. Applied Functional Materials 2022, 2, 1-11. https://doi.org/10.35745/afm2022v02.03.0001
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Copyright: ©
2022
The Author(s). Published with license by IIKII, Singapore. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (CC BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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