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Sylvie GENIÈS

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Published on 4 March 2025
 

Sylvie GENIÈS

Dr. Hab.​

Senior Expert​

Sylvie Geniès completed her PhD research on Li-ion batteries at LEPMI in Grenoble in 1995, focusing on the negative graphite electrode-electrolyte interface. She then pursued postdoctoral research on lithium-metal polymer batteries at EDF's Les Renardières Research Center in Moret-sur-Loing, at the Condensed Matter Physics Laboratory (LPMC) at École Polytechnique in Palaiseau, and at the Reactivity and Solid State Chemistry Laboratory (LRCS) in Amiens.

This experience was followed by five years with a lead-acid battery manufacturing company. In 2005, she came to CEA-Liten to study the durability of lead batteries for solar power.

She has been a research scientist in CEA-Liten's Hydrogen Energy and Transportation Department since 2009. Today, her research focuses almost exclusively on lithium-ion technology and, specifically, degradation mechanisms in Li-ion systems with liquid or solid electrolytes, which she studies using post-mortem and operando characterization techniques.

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Do​​mains​​​​

Axe de recherche : Batteries 

Team

  • ​​16 staff
  • 2 postdocs
  • 3 PhD students​​

Research Activities​​​

- Ex situ and operando electromechanical and physicochemical characterization to identify degradation mechanisms in Gen3 and Gen4 Li-ion batteries;  

- Component-level evaluation of physical and electrochemical parameters for Newman-type multiphysics modeling. ​


Selected publications and conferences:  


  • Revealing how internal sensors in a smart battery impact the local graphite lithiation mechanism, nature communications, 2024,
     DOI: 10.1038/s41467-024-54656-6
  • Using a Reference Electrode inside Li-Ion Cell As an Operando Sensor to Detect Aging Mechanisms, 244th ECS Meeting, 2023,
     DOI: 10.1149/MA2023-022165mtgabs
  • Operando Nuclear Magnetic Resonance study of the lithium plating mechanism for the optimization of Li-ion battery fast charge, AABC Europe (Advanced Automotive Battery Conference), 2023.
  • Experimental and theoretical investigation of Li-ion battery active materials properties: Application to a graphite/Ni06Mn02Co02O2 system, Electrochimica Acta, 2021,
     DOI: 10.1016/j.electacta.2020.137428
  • Si-C/G based anode swelling and porosity evolution in 18650 casing and in pouch cell, Journal of Power Sources, 2021,
     DOI: 10.1016/j.jpowsour.2021.230552

Selected patents: ​

  • 2022 | Préparation d'une électrode de référence à partir d'un matériau électro-actif à un état de charge intermédiaire, EP 4365985
  • 2019 | Procede d'etalonnage d'une famille d'elements de batterie lithium-ion, methode de charge, produit programme d'ordinateur et dispositif de charge associes, FR 3068829
  • 2016 | Procede de determination d'au moins un etat de securite d'un accumulateur electrochimique au lithium au moyen de jauge(s) de contrainte, FR 3034260