Abstract
This study proposes an optimization strategy to improve the energy storage performance of Bi0.5Na0.5TiO3 (BNT)-based ceramics. The strategy is to reduce the grain size, break the long-range polar ordering, form disordered polar nanoregions (PNRs), and increase the breakdown field strength (Eb). The (1-x)Bi0.5Na0.5TiO3-xNd(Mg2/3Nb1/3)O3 ((1-x)BNT-xNMN, x = 0.05, 0.10, 0.15 and 0.20) ceramics were prepared using this optimization strategy, and an ultrahigh recoverable energy storage density of 2.72 J/cm3 and an efficiency of 91.74% were obtained. Notably, this marks a several times increase in energy storage density compared to pure BNT ceramics. The energy storage density exhibits excellent electrical stability in the temperature range of 20–160 °C and frequency range of 1–200 Hz. Additionally, the power density (PD) of the ceramic reaches 19.74 MW/cm3 at an electric field of 180 kV/cm. These findings hold great promise as to pave the way for the development of cutting-edge energy storage solutions and high-performance capacitor materials.
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Acknowledgements
This work was supported by the Key Research and Development Program of Shaanxi Province (No. 2023-YBGY-423), the Foreign Experts Program of Science and Technology Ministry (Nos. G2023041034L; G2023041001L), Foundation of China Scholarship Council (No. 2020008610142), and Foundation of **’an Intelligent Optoelectronic Materials and Devices International Science and Technology Cooperation.
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Yu Pan contributed to software, data curation, writing—original draft, and writing—review and editing. Zhonghua Dai contributed to funding acquisition, conceptualization, and methodology. Chenxi Liu performed visualization and investigation. **n Zhao performed validation and formal analysis. Shintaro Yasui, Yu Cong and Shuitao Gu contributed to supervision, project administration, and resources.
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Pan, Y., Dai, Z., Liu, C. et al. High energy storage properties of Nd(Mg2/3Nb1/3)O3 modified Bi0.5Na0.5TiO3 lead-free ceramics. J Mater Sci 59, 3284–3296 (2024). https://doi.org/10.1007/s10853-024-09440-8
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DOI: https://doi.org/10.1007/s10853-024-09440-8