Superior energy storage performance in Bi 0.5 Na 0.5 TiO 3 based ceramics via synergistic design of high-entropy and superparaelectric-relaxor strategy

Entropy engineering (1.77R) induces a superparaelectric-relaxor state, achieving an ultra-high recoverable energy storage density of 12.2 J cm −3 with 81% efficiency, demonstrating great potential for pulse power devices.