Characterization of a P2-type chelating-agent-assisted Na 2/3 Fe 1/2 Mn 1/2 O 2 cathode material for sodium-ion batteries

A chelating-agent-assisted Na 2/3 Fe 1/2 Mn 1/2 O 2 material is studied as a cathode for sodium-ion batteries. The addition of NH 4 OH results in the formation of a homogeneous powder with a lower resistance and larger carbon content on the cathode surface. The formation of a thin and stable solid-electrolyte interface layer leads to its enhanced electrochemical performance.