Unveiling the electrode reaction for the High Entropy Nasicon materials NaM2(PO4)3 (M = Al, Fe, Mn, Zn, Nb, Cr, V, Ti) as anodes for recharg

The design of highly performing anodes for Na-Ion Batteries is a mandatory step for their commercialization. Here the study of new compositions of High Entropy Nasicon (NA Super Ionic CONductors) with formula NaM2(PO4)3 with M = Al, Fe, Mn, Zn, Nb, Cr, V, Ti is proposed by means of XAS techniques to identify the electrochemical role of each metal centre. The materials will be investigated under working conditions of the cell vs Na. This will allow for the i) determination of the correlation between each potential step to the relative M(n+1)/Mn+ couple, ii) follow the changes in the local structure during sodium insertion/extraction iii) establishment of the electrode working mechanism.