In recent years, close collaboration with the NIMBE laboratory team at CEA Saclay, led by Sophie Le Caer, has focused on the degradation of lithium battery electrolytes. Our approach involves simulating the effects of battery charge and discharge cycles on the electrolyte through external irradiation. This method has allowed us to better understand the underlying mechanisms of electrolyte degradation and the formation of H2, HF, or CO2 during battery operation [Puget2021, Paillot2023] as illustrated in the figure. The use of pulsed radiolysis has been crucial for identifying the early stages of degradation of different types of carbonates, such as vinyl carbonate, ethyl carbonate, and fluoroethylene carbonate, which are the main components of electrolytes.