铌酸钠基弛豫反铁电陶瓷储能性能优化

ntiferroelectrics display tremendous potential in achieving high energy storage density by leveraging their unique phase transition mechanisms under electric field, yet their inherent polarization hysteresis effects constrain improvements in energy storage efficiency and device longevity. Here, by introducing small tolerance factor BiScO? into NaNbO? to perturb long-range antiferroelectric order, we developed a novel relaxor antiferroelectric ceramic system (1-x)NaNbO?-xBiScO? (NN-xBS, x = 0, 0.06, and 0.07) by introducing low-tolerance-factor BiScO? to disrupt long-range antiferroelectric ordering. Increasing BS content enhances antiferroelectric behavior, thereby significantly improving energy storage performance. The optimal composition (x = 0.07) achieves a recoverable energy storage density of 6.2 J cm?3 with an fine efficiency of 65.8%. Optimization of energy storage performance of sodium niobate-based relaxation antiferroelectric ceramics demonstrating promising prospects for energy storage applications.