Operando XRD investigation of high entropy cathodes for Na-ion batteries

We are developing new high entropy cathodes for Na-ion batteries optimizing compositions and synthetic routes. We focused our attention to compositions Nax(Fe0.2Mn0.2Ni0.2Co0.2Ti0.2)O2 with x=0.75 and 1, which lead to the best performance in terms of specific capacity and stability. We found that different synthetic routes led to materials with different morphology and phase composition, which in turn affect the electrochemical properties. We propose to perform an operando XRD investigation on our cathodes to investigate on the structural and microstructural origin of their capacity and stability.