Enhancing the Cycling and Rate Performance of NaNiFeMnO Cathodes by La/Al Codoping.

O3-type layered oxides hold significant promise as the material for cathodes in sodium-ion batteries for their favorable electrochemical properties, while irreversible structural degradation and harmful phase transitions during cyclic operation limit the practical application of these materials. In this work, we proposed a La/Al codoping strategy in O3-Na(NiMnFe)O cathode materials and found that batteries with the Na (NiMnFe)LaAlO (NFM-La/Al) cathodes exhibited not only promoted capacity from 135.80 to 170.