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Doctoral student H/F : Surface engineering to solve interface problems in solid-state batteries

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

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General information

Reference : UMR8520-FRELEF-060
Date of publication : Tuesday, June 30, 2020
Scientific Responsible name : Christophe LETHIEN
Type of Contract : PhD Student contract / Thesis offer
Contract Period : 36 months
Start date of the thesis : 15 September 2020
Proportion of work : Full time
Remuneration : 2 135,00 € gross monthly

Description of the thesis topic

The Li-ion solid-state battery is constantly being advertised in the media by electric vehicle manufacturers. Substantial progress has been made in inorganic ionic conductors. However, the complexity of the interfaces means that our hopes must be tempered. Is there any solution? This thesis will attempt to answer this question through interracial engineering. It will consist in the deposition of a buffer layer (mainly acidic oxide) by sol-gel, atomic layer deposition (ALD) or sputtering techniques in order to understand/characterize the chemo-mechanical expansion of the Li1-xMO2 lamellar positive electrode. The negative electrode in contact with the electrolyte also presents interface problems related to the growth of dendrites, the formation of which will be visualized by in situ optical measurements. We will also try to solve these issues by depositing layers of Al2O3, Li3PO4, or even Si to ensure better surface wettability. This project, which combines the physical deposition of materials with the characterization of interfaces using advanced analytical methods, will benefit from the synergy between the IEMN laboratory (Lille) for deposition and the Collège de France (Paris) for electrochemical characterization techniques and cell assembly. The student will be located at the Collège de France.
A multidisciplinary profile with notions of materials science and electrochemistry would be welcome as well as a good command of English.

Work Context

Location Laboratoire Central IEMN and Collège de France

Additional Information

Contacting persons: Jean-marie Tarascon
Christophe Lethien

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