High energy storage density and large strain in Bi(Zn2/3Nb1/3)O3-Doped BiFeO3-BaTiO3 ceramics

WANG, Dawei, FAN, Zhongming, LI, Wenbo, ZHOU, Di, FETEIRA, Antonio, WANG, Ge, MURAKAMI, Shunsuke, SUN, Shikuan, ZHAO, Quanliang, TAN, Xiaoli and REANEY, Ian (2018). High energy storage density and large strain in Bi(Zn2/3Nb1/3)O3-Doped BiFeO3-BaTiO3 ceramics. ACS Applied Energy Materials, 1 (8), 4403-4412.

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Official URL: https://pubs.acs.org/doi/10.1021/acsaem.8b01099
Link to published version:: https://doi.org/10.1021/acsaem.8b01099
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    Abstract

    High recoverable energy density (Wrec ~ 2.1 J/cm3) was obtained in (0.7-x)BiFeO3-0.3BaTiO3-xBi(Zn2/3Nb1/3)O3 + 0.1wt% Mn2O3 (BF-BT-xBZN, x = 0.05) lead-free ceramics at < 200 kV/cm. Fast discharge speeds (< 0.5 μs), low leakage (~ 10-7 A/cm2) and small temperature variation in Wrec (~ 25% from 23 to 150 °C) confirmed the potential for these BiFeO3 based compositions for use in high energy density capacitors. A core-shell microstructure composed of a BiFeO3-rich core and BaTiO3-rich shell was observed by scanning and transmission electron microscopy which may contribute to the high value of energy density. In addition, for x = 0.005, a large electromechanical strain was observed with Spos = 0.463% and effective d33* ~ 424 pm/V, suggesting that this family of ceramics may also have potential for high strain actuators.

    Item Type: Article
    Departments - Does NOT include content added after October 2018: Faculty of Science, Technology and Arts > Department of Engineering and Mathematics
    Identification Number: https://doi.org/10.1021/acsaem.8b01099
    Page Range: 4403-4412
    Depositing User: Antonio Feteira
    Date Deposited: 19 Jul 2018 12:47
    Last Modified: 19 Jun 2020 13:33
    URI: http://shura.shu.ac.uk/id/eprint/22039

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