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Portail > Offres > Offre UMR8260-OZLSEL-003 - Post-doc (H/F) : étude de l'interface des électrodes de batterie par des méthodes in situ et operando

Postdoc position (H/F) in situ and operando methods for interface studies of battery electrodes

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 12 décembre 2022

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General information

Reference : UMR8260-OZLSEL-003
Workplace : PARIS 05
Date of publication : Monday, November 21, 2022
Type of Contract : FTC Scientist
Contract Period : 18 months
Expected date of employment : 6 February 2023
Proportion of work : Full time
Remuneration : the gross monthly salary is between 2889,51€ and 4082,90€, depending on experience
Desired level of education : PhD
Experience required : 1 to 4 years

Missions

A common challenge, essentially in all existing and newly developed battery chemistries, is the understanding, predicting, and controlling the battery interfaces. Tailoring this interface structuring via the proper salt-solvent interaction is the key to enabling the best power performances in alkali metal-ion batteries (Li-ion, Na-ion…). This project aims at describing this complex interface by various in-situ and ex-situ characterization techniques coupled with detailed electrochemical studies. The project will particularly benefit from operando piezoelectric sensing strategy, commonly known as Electrochemical Quartz Crystal Microbalance (EQCM). This methodology, benefitting from the new cell designs adapted to battery characterization, will be used to study the formation of the electrode (anode/cathode)/ electrolyte interface, stability of electrodes, ions' (de)solvation and intercalation process. Fundamental knowledge gained will be implemented to design better interfaces and to achieve stability, enhanced cycle-life and power in beyond Li-ion technologies.

Activities

Task I: Elaboration of electrodes/Classical structural and morphological characterization/Electrochemical performance evaluation
Task II: Battery interface analysis by advanced EQCM based methods and piezoelectric sensors (SEI/CEI formation, transfer/transport properties of species at interface/through the electrode, (de)solvation of ions).
Task III: Analysis/Modelling of the electrogravimetric results and correlation of these results with the results given by the other techniques.
Task IV: Data presentation, reporting, participation to publication preparation.

Skills

- Ph.D. in material science (ideally in the field of materials for energy storage) with strong skills in electrochemistry.
- Experience in analysis of battery materials by in situ/operando characterization methods, previous experience in EQCM is appreciated.
- Ability to work as an independent researcher with a high level of scientific judgement and initiative.
- Ability to work in a team environment.
- Excellent communication skills in English (both written and verbal)
- Able to work in an organized fashion, document and disseminate scientific results such as writing results in reports and publications.

Work Context

Within the Collège de France, the “Solid state chemistry-Energy (CSE)” is an internationally known laboratory focusing on the fundamental science of materials for energy storage and conversion devices, and belongs to “RS2E - French research network on electrochemical energy storage”. The main activities of the CSE lab includes the search for new Li reactivity mechanisms, the mastering of interfaces, the exploration of other chemistries beyond Li-ion such as Na-ion, as well as monitoring of the battery metrics with in situ sensors.

Constraints and risks

non

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