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High-efficiency energy storage in Nd-doped (1-x)BiFeO3–xBaTiO3 relaxor ferroelectric ceramics
Affiliation:1. International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices, Ming Chi University of Technology, New Taipei City, 24301, Taiwan;2. Department of Physics, Silliman University, Dumaguete City, 6200, Philippines;3. Department of Mechanical Engineering, Chang Gung University, Taoyuan City, 33302, Taiwan;4. Department of Mechanical Engineering, Hwa Hsia University of Technology, New Taipei City, 23567, Taiwan;5. Department of Physics, Fu Jen Catholic University, New Taipei City, 24205, Taiwan;1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China;2. Faculty of Science, Shizuoka University, Shizuoka, 422-8529, Japan;3. Graduate School of Science and Technology, Shizuoka University, Shizuoka, 422-8529, Japan;4. College of Science, Academic Institute, Shizuoka University, Shizuoka, 422-8529, Japan;5. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China;6. Hydrogen Isotope Research Center, University of Toyama, Toyama, 930-8555, Japan;1. State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China;2. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu, 610054, China;3. BGRIMM Magnetic Materials & Technology Co, Ltd, Beijing, 102600, China;1. Graduate Program in Aerospace Engineering, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50670-901, Recife, Brazil;2. Department of Mechanical Engineering, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50740-550, Recife, Brazil;3. Graduate Program in Materials Science, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50740-560, Recife, Brazil;4. Graduate Program in Chemistry, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50740-560, Recife, Brazil;5. Department of Fundamental Chemistry, Universidade Federal de Pernambuco, Av. Jorn. Aníbal Fernandes, 1235 - Cidade Universitária, 50740-560, Recife, Brazil;1. Faculty of Chemistry, Southern Federal University, Rostov-on-Don, Russia;2. Southern Scientific Center of Russian Academy of Science, Rostov-on-Don, Russia
Abstract:Dielectric capacitors as energy storage electronics have drawn much attention due to ultrahigh power densities with quick charging and discharging rates. In this report, A-site Nd-doped (1-x)BiFeO3-xBaTiO3 (x = 0.2–0.45) relaxor ferroelectric ceramics with superior storage efficiencies were prepared with 0.1 wt% MnO2 additive. Energy-storage efficiency (η) increases from 63.7% to 89% at 190 kV/cm as BaTiO3 increases accompanied by recoverable energy densities (Wrec) in the range of 2.5–2.7 J/cm3. The energy-storage performance persists thermally stable up to 125 °C. The superior storage efficiency is associated with growth of the cubic Pm-3m symmetry and the core-shell structure with increasing BaTiO3 content. The formation of nanocluster/nanomosaic structure also plays an essential role as a barrier in suppressing the long-range polarization order. This work provides a design of binary rare-earth doped BiFeO3–BaTiO3 dielectric ceramics for thermally stable and high-efficiency electrical energy storage.
Keywords:Energy storage efficiency  Energy density  Core-shell  Nanocluster  Polar nanoregion
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