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Profile | Photovoltaic solar power | Renewable energies
Dr. Hab.
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.
Domains
Team
- 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.
How can you design batteries with the lowest possible impact on the environment? Well, together with Laboratoire G-SCOP, CEA researchers combined LCA with parametric models. This unprecedented method allows them to quantify the impact of design choices on a battery’s environmental impact, including its lifetime.
By combining X-ray diffraction and small angle scattering at the ESRF, electrochemical analysis and gas detection, CEA researchers have managed to track the degradation of an overcharged Li-ion battery in real time. This breakthrough brings great opportunities, including the ability to identify the optimal operating range, refine aging models, and improve post-production quality models.
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CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.