Abstract
AbstractLead‐free (1‐x)BiFeO3‐x(0.85BaTiO3‐0.15Bi(Sn0.5Zn0.5)O3) [(1‐x)BF‐x(BT‐BSZ), x=0.45‐0.7] ceramic samples were prepared by solid phase sintering. It is revealed that the pure single‐phase perovskite structure can be obtained in samples with x ≥ 0.6. With increasing x, the measured ferroelectric hysteresis loop becomes gradually slimmed in accompanying with reduced remnant polarization, and a clear ferroelectric‐relaxor transition at x = 0.65 is identified. Furthermore, the measured electric breakdown strength can be significantly enhanced with increasing x, and the optimal energy storage performance is achieved at x = 0.65, characterized by the recoverable energy storage density up to ≈3.06 J/cm3 and energy storage efficiency as high as ≈92 %. Excellent temperature stability (25°C–110°C) and fatigue endurance (>105 cycles) for energy storage are demonstrated. Our results suggest that the BF‐based relaxor ceramics can be tailored for promising applications in high energy storage devices.
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