Realizing excellent energy storage properties in Na0.5Bi0.5TiO3-based lead-free relaxor ferroelectrics |
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| Affiliation: | 1. College of Materials Science and Engineering, Sichuan University, 610064, Chengdu, China;2. College of Materials Science and Engineering, Guilin University of Technology, 541004, Guilin, China;3. Department of Physics, University of Texas at Arlington, TX, 76019, USA;1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;2. School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg, 620000, Russia;3. State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;4. Chengdu Hongke Electronic Technology Co., Ltd, Chengdu, 610100, China;5. School of Materials and Energy, Southwest University, Chongqing, 400715, China;1. Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi’an, 710062 Shaanxi, China;2. School of Physics & Information Technology, Shaanxi Normal University, Xi’an, 710062 Shaanxi, China;3. School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710062 Shaanxi, China;1. Frontier Institute of Science and Technology, State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China;2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an 710049, China;1. Institute of Electro Ceramics & Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, PR China;2. Center for Advanced Ceramics, School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, PR China |
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| Abstract: | Development of lead-free dielectric capacitors with high recoverable energy storage density (Wrec), large energy storage efficiency (η), and wide usage temperature range are in high demanded for pulse power systems. Herein, we realized the enhancement of energy storage properties high Wrec = 3.76 J/cm3, large η = 78.80 %, and broad operating temperature range (20?180 °C)] in lead-free Na0.5Bi0.5TiO3 (BNT)-based relaxor ferroelectrics via component regulation. Excellent energy storage properties mainly originate from suppressing early polarization saturation and improving dielectric breakdown strength (Eb). Domain evolution on the nanoscale offers robust support to suppression of early polarization saturation. The enhancement of Eb can be derived from the contribution of the Mg-rich phase, which is also corroborative via first-principles calculation on basis of density functional theory (DFT). We believe that these findings in this work may provide a practicable guideline to build new lead-free ceramics for electrical energy storage applications. |
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| Keywords: | Lead-free ceramics Energy storage Power density |
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