首页|Enhanced energy storage performances of (Sr0.7Bi0.2)TiO3 ceramics through highly polarized Ba ions
Enhanced energy storage performances of (Sr0.7Bi0.2)TiO3 ceramics through highly polarized Ba ions
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NSTL
Elsevier
? 2022 Elsevier B.V.The goal of searching for advanced dielectrics with high energy storage properties (ESPTs) is still challenging. Here, novel (Sr0.7?xBaxBi0.2)TiO3 (x = 0–0.10) ceramics were designed to optimize dielectric breakdown and ESPTs to meet the needs of high storing energy. The dielectric behavior, energy storage properties, thermal stability, fatigue endurance, and discharging behavior of the studied ceramics were intensively explored. By replacing Sr2+ with highly polarized Ba2+, lattice distortion is induced to produce relaxation characteristics, which improves the maximum polarization and dielectric breakdown strength of the (Sr0.7?xBaxBi0.2)TiO3 ceramics. The optimal ESPTs can be obtained in the (Sr0.66Ba0.04Bi0.2)TiO3 ceramic with a charge energy density of 1.97 J/cm3 and an efficiency of 86.8% under 290 kV/cm, respectively. Simultaneously, it also shows excellent thermal stability in temperature from 30 °C to 160 °C, good fatigue behavior up to 105 cycles, and a fast discharging speed of 1.8 μs, indicating potential high-performance applications.
CeramicEnergy storageRelaxorThermal stability
Yao Z.、You W.、Zhang N.、Hao H.、Cao M.、Liu H.
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School of Material Science and Engineering State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology
NSTL
Elsevier
