Study of the Impact of Microstructure on the Effective Electrical Properties of Composite Electrodes for Lithium-Ion Batteries; Acquisition Andsimulations on Real Microstructures
Résumé
Better understanding of how the microstructure of composite electrodes affect their electrochemical performance is still required to achieve Lithium ion batteries of higher energy and power densities (Mohanty et al, 2016). Novel opportunity for progressing in this direction and explore relationships between composite electrode microstructure and electrochemical performance is implementation of X-ray computed tomography (XRCT) and focused ion beam in combination with scanning electron microscopy (FIB-SEM) techniques (Besnard et al, 2017). Sophisticated characterization techniques such as broadband dielectric spectroscopy (BDS) (Badot et al, 2016) and/or Pulsed Field Gradient Spin - Echo NMR (PFG-SE NMR) (Tambio et al, 2017) can also be used to measure transport properties and relate them to the composite electrode microstructure. Finally, numerical simulations performed on 3D volumes acquired by XRCT or FIB/SEM is a powerful tool to calculate effective transport properties and finely analyze the impact of the composite electrode microstructure (Cadiou et al, 2019). [no pdf]
