Snabbfakta
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- France
Ansök senast: 2024-06-01
Postdoctoral research engineer- Investigation of lithium-ion cells via electrochemical impedance spectroscopy and 3D numerical modeling M/ F
Publicerad 2024-04-02
Profil du candidat
Activités
The Institut de Chimie Moléculaire et des Matériaux d’Orsay (ICMMO) of Paris-Saclay University is looking for a one-year postdoc researcher to work on this project. As a Postdoctoral Research Engineer specialized in your field, you are expected to:
Contexte et environnement
Lithium-ion batteries (LIB) are the primary energy storage technology for modern portable electronic devices and for electric vehicles. They can also provide stationary storage for renewable energies and for grid frequency regulation. LIBs are likely to remain a dominant technology for the foreseeable future, with an enormous increase in demand. In this context, there is a strong incentive for battery manufacturers to accelerate the design of LIBs with enhanced performance, safety, and recyclability. R&D efforts are thus pursued in different areas, such as novel LIB materials and fabrication processes. The development of high-fidelity performance models is another important research field, with the potential to shorten and reduce the cost of LIB design cycles. To address this challenge, TotalEnergies and its affiliate SAFT are investigating a novel multiscale strategy aiming to predict accurately the initial and ageing performances of LIBs under various utilization scenarios. This strategy relies on microscale continuum models, where LIB electrodes are represented by their 3D microstructures. It requires a large amount of experimental characterization for model construction and validation, involving various material property measurements, electrochemical analysis, high-resolution imaging (e.g., FIB-SEM and X-ray tomography), post-mortem studies, as well as in-operando investigations of battery cycling. Electrical impedance spectroscopy (EIS) is a classical approach for battery electrode characterization. Actually, EIS is one of the most practical in situ analysis techniques, which can discriminate electrochemical processes by their time constant. In that sense, EIS is particularly interesting since it is a non-destructive investigation method, giving access to several electrochemical parameters of major interest in the battery field (charge transfer, passivation film, adsorption, corrosion, ionic diffusion, tortuosity...).