Large energy-storage density in transition-metal oxide modified NaNbO 3 –Bi(Mg 0.5 Ti 0.5 )O 3 lead-free ceramics through regulating the antiferroelectric phase structure

The combination of AFE phase structural regulation and breakdown strength optimization through chemical modification leads to a large energy-storage density of W rec ∼ 5.57 J cm −3 in NN–BMT lead-free bulk ceramics.