Structure, Dynamics, and Conductive properties of Polymerized Ionic Liquids. - Laboratoire Charles Coulomb (L2C) Accéder directement au contenu
Communication Dans Un Congrès Année : 2021

Structure, Dynamics, and Conductive properties of Polymerized Ionic Liquids.

Résumé

Polymerized ionic liquids (PolyILs) are an emerging class of polymer electrolytes which offer solutions to many problems in current battery technology. They combine the attractive features of ionic liquids with the mechanical strength of polymeric materials. However, a major obstacle in use of dry PolyILs is their low ionic conductivity at ambient temperature, which remains below the level required for many applications (ca. 10-3 S/cm). In this context, it has been shown that a significant enhancement of the ionic conductivity can be obtained by decoupling the ion motion from the segmental dynamics in polymers. We will review recent results obtained in this field using broadband dielectric spectroscopy, and discuss the microscopic parameters controlling ionic conductivity in PolyILs below Tg [1]. In particular, our detailed study of imidazolium-based PolyILs helped to unravel the interplay between nanostructure and ion conduction mechanism [2]. We also report first quasi-elastic neutron scattering experiments in these polymers suggesting the role of fast dynamics in assisting ion transport in the glassy state [3]. [1] V. Bocharova and A.P. Sokolov, Macromolecules 2020, 53, 4141. [2] B. Doughty, A.C. Genix, I. Popov, B. Li, S. Zhao, T. Saito, D. Lutterman, R. Sacci, B.G. Sumpter, Z. Wojnarowska, V. Bocharova, Phys. Chem. Chem. Phys. 2019, 21, 14775. [3] V. Bocharova, A.C. Genix, A. Kisliuk, G. Sala, N.C. Osti, E. Mamontov, A. P. Sokolov, J. Phys. Chem. B 2020, 124, 10539.
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hal-03283802 , version 1 (12-07-2021)

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  • HAL Id : hal-03283802 , version 1

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Anne-Caroline Genix, Vera Bocharova, Alexei Sokolov. Structure, Dynamics, and Conductive properties of Polymerized Ionic Liquids.. New Challenges in Polyelectrolyte Science, NAPS workshop, Jun 2021, Virtual Conference Online, France. ⟨hal-03283802⟩
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