Claire Villevieille
Claire Villevieille
University Grenoble-Alpes, France
Li-ion batteries, whether utilizing liquid or solid electrolytes, are governed by lithium transport mechanisms that are impeded by grain boundaries, interfacial resistances, and microstructural defects within both the solid electrolyte and the composite electrode. Unlike conventional Li-ion batteries where tortuosity describes a macroscopic property, solid-state batteries encounter microscopic barriers that complicate ionic pathways1-3. For example, lithium-ion percolation through polycrystalline ceramics is hindered by grain boundary resistance, while amorphous or glassy solid electrolytes may exhibit reduced ionic conductivity despite lower tortuosity. Effective microstructural control is crucial to mitigate these obstacles and enable efficient ion transport4. Utilizing advanced operando techniques, including operando FIB-SEM5 and operando neutron imaging, we demonstrate the influence of residual porosity within the electrolyte and the polycrystalline structure of the composite electrode on Li-ion transport hindrance.
Dr. Claire Villevieille is currently CNRS research director (Full Prof) at the LEPMI laboratory in Grenoble, France. Her research is especially dedicated to study the reaction mechanisms of the battery systems such as Li-ion, Na-ion, Li-S and recently all-solid-state batteries by means of various operando techniques. Moreover, her work centers on the proper design and/or adjustments of the measurement cells so that they meet the requirements of selected characterization techniques. Her research involves both, in-house devices as well as big facilities such as ERSF (Grenoble, France), ILL (Grenoble, France) and Soleil (Paris, France). Her doctoral studies focused on the conversion and insertion-based negative electrodes for Li-ion batteries and the elucidation of the complex reaction mechanisms using in situ X-Ray Diffraction (XRD), Mössbauer spectroscopy, SQUID measurements etc Her primary interests include solid state synthesis, electrochemical properties, and bulk–surface relationship of the various electrode materials.