Evaluation of O3-type Na0.8Ni0.6Sb0.4O2 as cathode materials for sodium-ion batteries

Novel O3-type Na 0.8 Ni 0.6 Sb 0.4 O 2 is successfully fabricated via a solid-state method and further firstly used as cathode material for sodium-ion batteries (SIBs). The as-obtained material delivers a high capacity of ~107.3 mAh g −1 in the voltage range of 2–4.5 V with two discharge plateaus at 3.24 and 3.62 V, and exhibits a good capacity retention (98.5 mAh g −1 at the rate of 0.2 C after 100 cycles).