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Investigation of the Impact of the Anionic Moiety of Imidazolium-Based Ionic Liquids on the Thermoelectric Properties of Polypyrrole.

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Title: Investigation of the Impact of the Anionic Moiety of Imidazolium-Based Ionic Liquids on the Thermoelectric Properties of Polypyrrole.
Authors: Mokrani, Mohamed Ali1 (AUTHOR) mohamedalimokrani95@gmail.com, Bekkar Djelloul Sayah, Zakaria1 (AUTHOR) bekkar_zakaria@yahoo.fr, Chabane, Houssém1 (AUTHOR), Mekki, Ahmed1 (AUTHOR), Bourenane Cherif, Younes1 (AUTHOR), Nedjar, Linda1 (AUTHOR), Kaufa, Mammar1 (AUTHOR), Slimani, Zineb Yasmine1 (AUTHOR), Manseri, Amar2 (AUTHOR), Livi, Sébastien3 (AUTHOR), Durastanti, Jean-Felix4 (AUTHOR)
Source: Journal of Electronic Materials. May2026, Vol. 55 Issue 5, p4043-4063. 21p.
Subjects: Polypyrrole, Ionic liquids, Seebeck coefficient, Composite materials, Thermal conductivity, Thermoelectric materials, Electric conductivity
Abstract: This study explores the influence of the anionic moiety of imidazolium-based ionic liquids (ILs) on the thermoelectric properties of polypyrrole (PPy). The selected ionic liquids have gained significant attention due to their interesting electrical and thermal properties, which can enhance the thermoelectric performance of polymer-based materials. In this work, a series of polypyrrole-based composite materials were processed with different imidazolium ILs, varying the nature of the counter anions to investigate their effect on the electrical conductivity, Seebeck coefficient, and thermal conductivity of the polymer. Through a combination of physicochemical and thermoelectric characterization, including Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and thermoelectric measurements, the effect of the ionic liquid on the physicochemical and thermoelectric properties of polypyrrole was investigated. The results demonstrated that the anionic structure plays a key role in enhancing the thermoelectric properties of PPy. In fact, the incorporation of 1-ethyl-3-methylimidazolium tetrachloroferrate(III) (EMImFeCl4) led to a significant improvement in the Seebeck coefficient (S = 384.615 µV·K−1), with PPy-EMImFeCl4 showing the most notable increase in terms of figure of merit (ZT = 5.109 × 10−3), which was approximately 250 times that of the neat polypyrrole. This effect is also attributed to the ability of EMImFeCl4 to reduce the thermal conductivity (κ = 0.069 W·m−1·K−1). [ABSTRACT FROM AUTHOR]
Copyright of Journal of Electronic Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Investigation of the Impact of the Anionic Moiety of Imidazolium-Based Ionic Liquids on the Thermoelectric Properties of Polypyrrole.
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  Data: <searchLink fieldCode="AR" term="%22Mokrani%2C+Mohamed+Ali%22">Mokrani, Mohamed Ali</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> mohamedalimokrani95@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Bekkar+Djelloul+Sayah%2C+Zakaria%22">Bekkar Djelloul Sayah, Zakaria</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> bekkar_zakaria@yahoo.fr</i><br /><searchLink fieldCode="AR" term="%22Chabane%2C+Houssém%22">Chabane, Houssém</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mekki%2C+Ahmed%22">Mekki, Ahmed</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bourenane+Cherif%2C+Younes%22">Bourenane Cherif, Younes</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nedjar%2C+Linda%22">Nedjar, Linda</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kaufa%2C+Mammar%22">Kaufa, Mammar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Slimani%2C+Zineb+Yasmine%22">Slimani, Zineb Yasmine</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Manseri%2C+Amar%22">Manseri, Amar</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Livi%2C+Sébastien%22">Livi, Sébastien</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Durastanti%2C+Jean-Felix%22">Durastanti, Jean-Felix</searchLink><relatesTo>4</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Polypyrrole%22">Polypyrrole</searchLink><br /><searchLink fieldCode="DE" term="%22Ionic+liquids%22">Ionic liquids</searchLink><br /><searchLink fieldCode="DE" term="%22Seebeck+coefficient%22">Seebeck coefficient</searchLink><br /><searchLink fieldCode="DE" term="%22Composite+materials%22">Composite materials</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+conductivity%22">Thermal conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Thermoelectric+materials%22">Thermoelectric materials</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: This study explores the influence of the anionic moiety of imidazolium-based ionic liquids (ILs) on the thermoelectric properties of polypyrrole (PPy). The selected ionic liquids have gained significant attention due to their interesting electrical and thermal properties, which can enhance the thermoelectric performance of polymer-based materials. In this work, a series of polypyrrole-based composite materials were processed with different imidazolium ILs, varying the nature of the counter anions to investigate their effect on the electrical conductivity, Seebeck coefficient, and thermal conductivity of the polymer. Through a combination of physicochemical and thermoelectric characterization, including Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and thermoelectric measurements, the effect of the ionic liquid on the physicochemical and thermoelectric properties of polypyrrole was investigated. The results demonstrated that the anionic structure plays a key role in enhancing the thermoelectric properties of PPy. In fact, the incorporation of 1-ethyl-3-methylimidazolium tetrachloroferrate(III) (EMImFeCl4) led to a significant improvement in the Seebeck coefficient (S = 384.615 µV·K−1), with PPy-EMImFeCl4 showing the most notable increase in terms of figure of merit (ZT = 5.109 × 10−3), which was approximately 250 times that of the neat polypyrrole. This effect is also attributed to the ability of EMImFeCl4 to reduce the thermal conductivity (κ = 0.069 W·m−1·K−1). [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Journal of Electronic Materials is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11664-026-12764-7
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        Text: English
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        PageCount: 21
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      – SubjectFull: Polypyrrole
        Type: general
      – SubjectFull: Ionic liquids
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      – SubjectFull: Seebeck coefficient
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              Text: May2026
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