High recoverable energy storage density of Na0.5Bi0.5TiO3 lead-free ceramics modified by Bi(Mg0.5Hf0.5)O3

• DOI: 10.1142/s2010135x2350008x
• Publication Date: 2023-03-05T05:20:41Z
• Authors: Kaiyuan Wang; Wenhua Li; Xingui Tang; Siyuan Zhang; Yansong Zhang; Jia Hu; Zhihao Shen; Yanping Jiang; Xiaobin Guo
• Keywords: QC501-721; Electricity; energy storage; dielectric properties; Bi; Lead-free ceramic; 7. Clean energy

Enhancing the availability and reliability of dielectric ceramic energy storage devices is great importance. In this work, (1-[Formula: see text])[Formula: text]–[Formula: text]Bi([Formula: text] (NBT–[Formula: text]BMH) lead-free ceramics were created utilizing a solid-state reaction technique. All NBT–[Formula: text]BMH have single perovskite structure. With increasing BMH doping, grain size shrinks drastically, which greatly enhances breakdown electric field (310 kV/cm at [Formula: = 0.25). Additionally, relaxation behaviors with high content are more remarkable. Among all designed components, NBT–0.25BMH exhibits best performance 4.63 J/[Formula: an 75.1% 310 kV/cm. The has exceptional resistance to fluctuations in both frequency (5–500 Hz) temperature (30–100[Formula: text]C). Charge–discharge test shows that quick discharge rate ([Formula: 110 ns). these properties, may applications microdevices as well ultra-high power electronic systems.