Investigation of electrochemical and electromechanical properties of nanostructured LiCoO2 electrodes for energy storage devices

Axe 2 - Matériaux multifonctionnels et environnement

Post-doctorat de Aziz Nechache

Recherche menée depuis le 1er 2017

Laboratoires co-porteurs

• Laboratoire Interfaces et Systèmes Electrochimiques
  Porteur de projet : Ozlem Sel
• Laboratoire Chimie de la Matière Condensée de Paris
  Co-encadrants : Natacha Krins, Christel Laberty-Robert

Projet de recherche

In Li-ion batteries, repeated ion insertion/deinsertion affects the electrode structure and thereby its mechanical integrity, causing long-term cycling performance deterioration. The recent quest towards high-capability electrodes, typically nanoparticles-based active material, requires even faster cycling that will develop even more stresses within the electrode. It is therefore crucial, although not yet reported, to be able to monitor in situ mechanical stresses together with ions transport dynamics to better understand the electrode evolution, and in fine design efficient high-rate functioning electrodes. In this collaboration, we will focus on LiCoO2 nanoparticles (NPs)-based composite cathode, and we will use Electrochemical Quartz Crystal Microbalance based methods for the monitoring. We intend to identify, amongst various parameters (NPs size/coating, composite composition, various Li salt) an optimal formulation that will be tested in coin cell for long-term cycling evaluation.