Abstract
In this work, Bi(Mg2/3Nb1/3)O3 (BMN) was introduced to improve the electrical properties and energy storage performance of Bi0.5(Na0.82K0.18)0.5TiO3 (BNKT) ceramics, and the lead-free ceramics BNKT-xBMN (x = 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14, 0.16) were synthesized via a traditional sintering process. The relaxation behavior and thermal stability of the materials were enhanced as well as the temperature corresponding to the maximum permittivity decreased monotonously from about 300 °C at x = 0, to 250 °C at x = 0.16 with the increasing of BMN content. Besides, a slim P-E loop with a large ∆P was obtained after doped BMN. Eventually, at a BMN doping level of 0.08, a BNKT-0.08BMN ceramic obtained high energy storage density of 2.20 J/cm3 as well as an acceptable efficiency of 55.7% under a low electric field of 110 kV/cm. Furthermore, a good temperature/frequency stability was achieved in BNKT-0.08BMN ceramic, as well as glorious fatigue behavior of energy storage properties. This work not only clarifies the internal relationship between the structure and properties of BNKT-BMN, but also provides useful insights for the optimization of electrical properties and energy storage behavior of lead-free energy storage bulk materials.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This work was supported by the National Science Foundation of China (Grant No. 51872177, 51577111, 51607108). The authors would also like to thank the Natural Science Basic Research Plan in the Shaanxi Province of China (Grant No. 2021ZDLSF06-03, 2021JM-201), Science and Technology Project of Xi,an, China (Grant No. 2020KJRC0014) and the Fundamental Research Funds for the Central Universities (Program No. GK202002014).
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All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by ZP, JW, and MN. The first draft of the manuscript was written by ZP and JW, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Peng, Z., Wang, J., Niu, M. et al. Structure, electrical properties and energy storage performance of BNKT-BMN ceramics. J Mater Sci: Mater Electron 33, 3053–3064 (2022). https://doi.org/10.1007/s10854-021-07507-9
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DOI: https://doi.org/10.1007/s10854-021-07507-9