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How to tune ion transport in innovative ionogels?

Contact: ALBA-SIMIONESCO Christiane, , christiane.alba-simionesco@cea.fr, +33 1 69 08 32 54
Summary:
This joined project between the Laboratoire Léon Brillouin (LLB, Saclay) and the Laboratoire Charles Coulomb (L2C, Montpellier) targets to use the innovative potential of ionic silica scaffold recently developed by the Institut Charles Gerhardt de Montpellier (ICGM). The master 2 student will characterize the porous microstructure and its reversible filling properties by ionic liquids, the final goal being to boost the ionic conductivity in the framework of batterie applications.
Possibility of continuation in PhD: Oui
Deadline for application:01/03/2023

Full description:
Ionic conductivity is a key property for emerging energy technologies and, in particular, the new generation of solid-state batteries for electric vehicles. In a joint ANR project between the ‘Laboratoire Charles Coulomb’ (L2C) and the ‘Institut Charles Gerhardt de Montpellier’ (ICGM), we will explore how ionic transport processes in an innovative solid conductive network of ionosilica can be enhanced by incorporating ionic liquids of high ionic conductivity.

As a first step, the candidate will characterize the porous ionosilica structure. Then, he/she will study the confinement of small, simple molecules (water, alcohol) used as local probe with strong and well-defined dipole moment. Due to the limited availability of neutrons, we plan to use contrast variation by H/D-alcohol mixtures in order to measure the scattering length density (and thus chemistry) of the scaffold, and possibly its structure by small-angle scattering of neutrons (SANS) and X-rays (SAXS). In the next step, the confinement of selected ionic liquids with two significantly different counterion sizes will be studied. An attractive goal is to be able to settle a reversible filling of the porous structure in the framework of material reuse and life cycle assessment.
Technics/methods used during the internship:
The candidate – based at LLB with short stays to plan in Montpellier – will have the opportunity to use a panel of advanced techniques: broadband dielectric spectroscopy, SAXS and WAXS, possibly SANS, but also temperature-modulated calorimetry, FTIR and gaz adsorption. An introduction to neutron scattering will be proposed. Contact : Anne-Caroline Genix, responsable, Associate Professor, anne-caroline.genix@umontpellier.fr

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