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.