Wang, D., Fan, Z., Li, W. et al. (8 more authors) (2018) High Energy Storage Density and Large Strain in Bi(Zn 2/3 Nb 1/3 )O 3 -Doped BiFeO 3 –BaTiO 3 Ceramics. ACS Applied Energy Materials, 1 (8). pp. 4403-4412. ISSN 2574-0962
Abstract
High recoverable energy density (Wrec ∼ 2.1 J/cm3) was obtained in (0.7 – x)BiFeO3-0.3BaTiO3-xBi(Zn2/3Nb1/3)O3 + 0.1 wt % 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.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2018 American Chemical Society. This is an author produced version of a paper subsequently published in ACS Applied Energy Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Bismuth ferrite; capacitors; dielectrics; energy storage; lead-free ceramics; piezoelectrics |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 13 Feb 2019 12:55 |
Last Modified: | 16 Jul 2019 00:40 |
Published Version: | https://doi.org/10.1021/acsaem.8b01099 |
Status: | Published |
Publisher: | American Chemical Society |
Refereed: | Yes |
Identification Number: | 10.1021/acsaem.8b01099 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:142200 |