Probing the Compositional and Structural Effects on the Electrochemical Performance of Na(Mn-Fe-Ni)O Cathodes in Sodium-Ion Batteries.

This study systematically investigates an Mn-Fe-Ni pseudo-ternary system for Na(Mn-Fe-Ni)O cathodes, focusing on the effects of varying transition metal fractions on structural and electrochemical properties. X-ray diffraction reveals that increasing Mn content induces biphasic behavior. A higher Ni content reduces the parameter, while higher Mn and Fe concentrations expand the lattice.

Ti-substitution Facilitating Anionic Redox and Cycle Stability in P2-type NaMnNiO Na-ion Battery Cathode.

P2-type layered oxides have attracted tremendous attention as the leading candidate for the cathode material in Na-ion batteries owing to their ease of synthesis and facile Na-ion diffusion. In this work, an in-depth investigation of the electrochemical behavior of P2-type (space group 6/) 10% Ti-doped NaMnNiO2 is carried out in different voltage ranges (1.5-4.