Energy storage performance of NaNbO3 lead-free dielectric ceramics by doping Sr(Mg1/3Sb2/3)O3

Abstract

With the development of research on energy storage ceramics, researchers have found more efficient ways to regulate their energy storage performance. However, there are few reports on the relationship between defects in ceramics and their energy storage performance. This study proposes an innovative strategy to improve the activation energy of grains and the grain boundary of ceramics by regulating the concentration of oxygen vacancy defects, thereby improving E_b and W_rec. The 0.87NaNbO₃–0.13Sr(Mg_1/3Sb_2/3)O₃ ceramic obtained a W_rec of 6.17 J cm⁻³ at 640 kV cm⁻¹, and exhibited good energy storage stabilities in the ranges of 40–140 °C and 10–120 Hz. These properties indicate that 0.87NaNbO₃–0.13Sr(Mg_1/3Sb_2/3)O₃ ceramics have broad application prospects in the field of energy storage ceramics.