Missions

We are seeking a highly motivated and skilled postdoctoral researcher to join our team for a fundamental study of interfacial processes in non-aqueous battery systems, with a focus on electrolyte–electrode interface dynamics and ion intercalation mechanisms.
This position is part of the ANR DEEP-SENS project, which aims to improve our understanding of electrode–electrolyte interfaces in rechargeable batteries through in situ characterization.
The project leverages AC-electrogravimetry—a technique combining QCM-type piezoelectric sensors with electrochemical impedance spectroscopy (EIS)—to investigate key interfacial phenomena in systems such as lithium-ion and sodium-ion batteries, with emphasis on (i) SEI/CEI layer formation and evolution, (ii) Ion (de)solvation at interfaces, (iii) Interfacial ion transfer mechanisms and (iv) Mechanical property changes of electrodes during cycling.

Activités

The project will investigate the behavior of ions at the electrode–electrolyte interface, with a particular focus on desolvation processes preceding ion intercalation. To achieve this, advanced electrochemical techniques such as EQCM, EIS, and their coupling (AC-electrogravimetry) will be used to monitor mass and charge transfer dynamics in real time. The study will begin with well-known electrolyte systems to establish fundamental insights, with the potential to explore a wider range of electrolyte compositions as the project evolves.
Key Responsibilities:
• Design and carry out EQCM, EIS, and AC-electrogravimetric measurements to analyze interfacial processes during ion intercalation.
• Interpret data to elucidate desolvation steps and their impact on intercalation mechanisms.
• Perform complementary interfacial characterizations using classical techniques.
• Contribute to the development of composition–property relationships for optimized electrolyte–electrode systems.
• Collaborate with theoretical and experimental partners to cross-validate findings.

Compétences

• PhD in Electrochemistry, Materials Science, Physical Chemistry, or a related field.
• Strong background in battery interfaces, ion transport, or surface analysis.
• Hands-on experience with EQCM and EIS; experience with AC-electrogravimetry is a strong plus.
• Familiarity with non-aqueous electrolytes and intercalation materials.
• Excellent analytical skills and scientific writing ability.

Contexte de travail

This postdoctoral project is part of an ANR-funded project (DEEP-SENS) involving two academic laboratories and one industrial partner: CSE – Solid-State Chemistry and Energy Laboratory (Collège de France, Paris), LISE – Interfaces and Electrochemical Systems Laboratory (Sorbonne University, Paris), and the company BioLogic (Grenoble).
At the Collège de France (Paris, France), the Solid-State Chemistry and Energy Laboratory (CSE) is an internationally recognized research group specializing in the fundamental science of materials for energy storage and the development of storage devices.
The lab's core activities include the design of new insertion materials, the investigation of novel lithium reactivity mechanisms, interface engineering, and the exploration of alternative chemistries beyond Li-ion, such as Na-ion and solid-state batteries. The lab also develops in situ approaches to monitor key battery metrics using integrated sensors.

Contraintes et risques

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