Descriptif des activités de recherche
This Ph.D. focuses on the high-voltage spinel LiNi0.5Mn1.5O4 (LNMO) used as positive electrode material for Li-ion batteries. Our goal is to correlate the structural information to electrochemical performance at the primary particle scale. Thus, various LNMO samples presenting different morphologies will be synthesized and characterized by diffraction (X-ray and neutrons) and spectroscopy techniques (NMR, Raman), and X-ray absorption spectroscopy at large-scale facilities. The (de)lithiation mechanisms will be studied by scanning electron microscopy coupled with precession (Astar System, 4D-STEM), providing information on the local crystalline structure with spatial resolution. Supervisors : Dr. Laurence Croguennec (ICMCB) Dr. Arnaud Demortière (LRCS), Dr. Jacob Olchowka (ICMCB), Prof. Christian Masquelier (LRCS), Dr. François Weill (ICMCB)Parcours
Master Chimie et Sciences des Matériaux pour l’Energie et le Développement Durable (Université de Montpellier, 2020)
Compétences
Synthesis, Crystallography, Transmission Electron Microscopy, 4D-STEM, Electrochemistry, Spectroscopy
Projets en cours
ANR DestiNa-ion Operando (2020-2023)
LRCS, ICMCB,ESRF,SIMAP
