A-site compositional modulation in barium titanate based relaxor ceramics to achieve simultaneously high energy density and efficiency |
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| Affiliation: | 1. School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an, 710021, China;2. School of Electronic Information Engineering, Xijing University, Xi''an, 710123, China;3. College of Information Science and Engineering, Guilin University of Technology, Guilin, 541004, China;4. School of Materials Science and Engineering, Nanchang University, Nanchang, 330031, China;1. School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an, 710021, China;2. Department of Materials and Earth Sciences, Technical University of Darmstadt, 64287, Darmstadt, Germany;3. Physics of Surfaces, Institute of Materials Science, Technical University of Darmstadt, 64287, Darmstadt, Germany;1. School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 710021, China;2. School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou, 510006, China;1. Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science and Technology, Xi’an, 710021, China;2. School of Electronic Information & Artificial Intelligence, Shaanxi University of Science and Technology, Xi’an, 710021, China;3. Xianyang Non-metallic Mineral R & D Institute Co., Ltd, Xianyang, 712021, China |
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| Abstract: | Dielectric ceramics capacitors (DCC) with excellent energy storage performance (ESP) and charge-discharge performance (CDP) is very critical in the field of advanced electronics and power systems. A strategy that improves the ESP of 0.6Ba(Zr0.2Ti0.8)O3-0.4(Na0.5Bi0.5)TiO3 (BZT-NBT) ceramics was proposed via Sr2+ doping. XRD and SEM results confirmed that 0.6(Ba1-xSrx)(Zr0.2Ti0.8)O3-0.4(Na0.5Bi0.5)TiO3 (x = 0, 0.1, 0.2, 0.3, 0.4) (BSZT-NBT) ceramics formed dense and stable perovskite solid solutions. The relaxor ferroelectric (RFE) properties of BSZT-NBT ceramics were also well proved by dielectric behaviors. A large recoverable energy storage density (Wrec) and large efficiency (η) of 3.72 J cm−3 and 94.03 % (x = 0.3) can be simultaneously obtained at 289 kV cm-1. ESP of BSZT-NBT (x = 0.3) ceramics at 180 kV cm-1 exhibit good frequency (1−100 Hz) and temperature (room temperature (RT)-120 °C) stability. BSZT-NBT (x = 0.3) ceramics at 120 kV cm−1 exhibit a prominent power density (PD) and rapid discharge rate (t0.9) of of 37.62 MW cm−3 and 70.6 ns. All evidences confirm that introduction of Sr2+ into A-site of barium titanate-based ceramics could effectively improve ESP. |
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| Keywords: | Barium titanate-based Ultrafast discharge rate Temperature and frequency stability Energy storage properties |
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