Boosting electrochemical reaction and suppressing phase transition with a high-entropy O3-type layered oxide for sodium-ion batteries

A high-entropy O3-type layered oxide cathode Na(Fe 0.2 Co 0.2 Ni 0.2 Ti 0.2 Sn 0.1 Li 0.1 )O 2 with disordered distribution of multi-component transition metals suppresses the complex intermediate phase transition, enabling highly reversible electrochemical reaction.