Large energy storage density in BiFeO3-BaTiO3-AgNbO3 lead-free relaxor ceramics

Lead-free (0.70-x)BiFeO3-0.30BaTiO3-xAgNbO3+5‰mol CuO (abbreviated as BF-BT-xAN) ceramics were fabricated using a modified thermal quenching technique. BF-BT-xAN ceramics are of a perovskite structure with morphotropic phase boundary (MPB) and show strong relaxor properties. Remarkably, the high rec...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2020-07, Vol.40 (8), p.2929-2935
Main Authors: Sun, Haonan, Wang, Xiangjian, Sun, Qinzao, Zhang, Xiaoxiao, Ma, Zhuang, Guo, Mengyao, Sun, Buwei, Zhu, Xiaopei, Liu, Qida, Lou, Xiaojie
Format: Article
Language:English
Subjects:
Applied Physics
Bismuth ferrite
Energy storage
Ferroelectrics
Lead-free ceramics
Relaxor
Thermal stability
Tillämpad fysik
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Summary:Lead-free (0.70-x)BiFeO3-0.30BaTiO3-xAgNbO3+5‰mol CuO (abbreviated as BF-BT-xAN) ceramics were fabricated using a modified thermal quenching technique. BF-BT-xAN ceramics are of a perovskite structure with morphotropic phase boundary (MPB) and show strong relaxor properties. Remarkably, the high recoverable energy storage density of 2.11 J/cm3 is obtained for BF-BT-xAN with x = 0.14. For the x = 0.14 ceramics, its energy storage efficiency is as high as 84 % at relative low field of 195 kV/cm, together with an outstanding thermal stability in a broad temperature range from 25 °C to 150 °C. In addition, this ceramic maintains superior energy storage performance even after 8 × 104 electrical cycles due to its high densification after doping Ag2O and Nb2O5. The result suggests that lead-free BF-BT-xAN ceramics may be promising candidate for dielectric energy storage application.
ISSN:0955-2219
1873-619X
1873-619X
DOI:10.1016/j.jeurceramsoc.2020.03.012