Excellent energy storage properties, domain mechanism, and temperature stability of lead-free BaTiO3-Bi(Mg1/2Sn1/2)O3 bulk ferroelectrics

Pulsed power systems require high-performance capacitors with high energy storage density. In this work, (1 − x)BaTiO3-xBi(Mg1/2Sn1/2)O3 ferroelectric ceramics were synthesized in a solid-state solution. The sample of x = 0.12 (0.88BT-0.12BMS) has excellent energy storage density, wide temperature,...

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Veröffentlicht in:Applied physics letters 2023-04, Vol.122 (17)
Hauptverfasser: Qie, Dan, Tang, Zhenhua, Fang, Junlin, Yao, Dijie, Zhang, Li, Jiang, Yan-Ping, Sun, Qi-Jun, Zhang, Dan, Fan, Jing-Min, Tang, Xin-Gui, Liu, Qiu-Xiang, Zhou, Yi-Chun
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Sprache:eng
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Zusammenfassung:Pulsed power systems require high-performance capacitors with high energy storage density. In this work, (1 − x)BaTiO3-xBi(Mg1/2Sn1/2)O3 ferroelectric ceramics were synthesized in a solid-state solution. The sample of x = 0.12 (0.88BT-0.12BMS) has excellent energy storage density, wide temperature, and wide frequency stability. The excellent energy density of 4.87 J/cm3 at 315 kV/cm and the energy efficiency of 72% at room temperature for 0.88BT-0.12BMS ceramics were achieved. Furthermore, the 0.88BT-0.12BMS ceramics demonstrated well temperature stabilities in the range of 20–100 °C and very good frequency stability in the range of 1–100 Hz. Through pulsed charging–discharging testing, the current density is calculated as 314.01 A/cm2, and the power density is 21.98 MW/cm3. Moreover, the oxygen vacancies' defects and ferroelectric domain mechanism for enhanced breakdown strength as well as high energy density were discussed. These findings broaden the horizon for lead-free dielectrics and show promising applications for pulse power capacitors.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0137616