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Profile | Photovoltaic solar power | Renewable energies
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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.
- 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.
As part of the European NextBat project, CEA-Liten has designed a battery module in which a single fluid simultaneously cools and compresses the cells. This architecture aims to extend cell lifespan and improve system safety, particularly in intensive applications.
When thermal runaway occurs in a battery, the gases emitted (or generated) can ignite! CEA-Liten has developed a system to manage these gases to prevent this type of event, which often involves the projection of fragments and the release of toxic fumes. The initial results have been promising.
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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.