GANDALF
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GANDALF aims at modifying the surface of positive electrodes (LiFexMn1-xPO4 (LFMP) and LiNi0.5Mn1.5O4 (LNMO)) of Li-ion devices by a novel atomic layer fluorination process, improving their inertness towards their electrolytic environment, augmenting their performances as high-voltage systems, and validating their use as real-life size SAFT prototypes. Through a PhD funded by the RS2E, we could study our novel atomic layer fluorination process, so-called ALF, on TiO2, Li4Ti5O12 (LTO), LiCoO2 (LCO), and Li(Ni0.80Co0.15Al0.05)O2 (NCA). For each system, we demonstrate that ALF-electrodes display improved cyclability, polarization, and cycle life. Electrochemical operando FTIR measurements show that ALF-NCA is relatively inert towards its electrolyte, as compared to pristine NCA. Encouraged by the ANR, we were advised to build this project as PRCE in order to reach the industrial validation.
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