High energy storage properties of lead-free Mn-doped (1-x)AgNbO3-xBi0.5Na0.5TiO3 antiferroelectric ceramics |
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| Affiliation: | 1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo, 454003, China;2. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo, 454003, China;3. Electronic Materials Research Laboratory, Xi’an Jiaotong University, Xi''an, 710049, China;1. School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China;2. School of Materials Science and Engineering, Liaocheng University, Liaocheng, 252059, China;3. School of Materials Science & Engineering, Tongji University, 4800 Caoan Road, Shanghai, 201804, China;1. School of Physics and Electronic Information Engineering, Henan Polytechnic University, Jiaozuo 454003, China;2. Electronic Materials Research Laboratory, Xi''an Jiaotong University, Xi’an 710049, China;3. School of Advanced Materials and Nanotechnology, Xidian University, Xi’an 710071, China;1. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China;2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi''an 710049, China |
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| Abstract: | In this work, 0.2 wt.% Mn-doped (1-x)AgNbO3-xBi0.5Na0.5TiO3 (x = 0.00–0.04) ceramics were synthesized via solid state reaction method in flowing oxygen. The evolution of microstructure, phase transition and energy storage properties were investigated to evaluate the potential as high energy storage capacitors. Relaxor ferroelectric Bi0.5Na0.5TiO3 was introduced to stabilize the antiferroelectric state through modulating the M1-M2 phase transition. Enhanced energy storage performance was achieved for the 3 mol% Bi0.5Na0.5TiO3 doped AgNbO3 ceramic with high recoverable energy density of 3.4 J/cm3 and energy efficiency of 62% under an applied field of 220 kV/cm. The improved energy storage performance can be attributed to the stabilized antiferroelectricity and decreased electrical hysteresis ΔE. In addition, the ceramics also displayed excellent thermal stability with low energy density variation (<6%) over a wide temperature range of 20−80 °C. These results indicate that Mn-doped (1-x)AgNbO3-xBi0.5Na0.5TiO3 ceramics are highly efficient lead-free antiferroelectric materials for potential application in high energy storage capacitors. |
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| Keywords: | Antiferroelectricity Phase transition Energy storage density Efficiency |
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