Phase-Field Simulations of Tunable Polar Topologies in Lead-Free Ferroelectric/Paraelectric Multilayers with Ultrahigh Energy-Storage Performance

Dielectric capacitors are emerging energy-storage components that require both high energy-storage density and high efficiency. The conventional approach to energy-storage enhancement is polar nanodomain engineering via chemical modification. Here, a new approach of domain engineering is proposed by exploiting the tunable polar topologies that have been observed recently in ferroelectric/paraelectric multilayer films. Using phase-field simulations, it is demonstrated that vortex, spiral, and in-plane polar structures can be stabilized in BiFeO3/SrTiO3 (BFO/STO) multilayers by tailoring the strain state and layer thickness. Various switching dynamics are realized in these polar topologies, resulting in relaxor-ferroelectric-, antiferroelectric-, and paraelectric-like polarization behaviors, respectively. Ultrahigh energy-storage densities above 170 J cm(-3) and efficiencies above 95% are achievable in STO/BFO/STO trilayers. This strategy should be generally implementable in other multilayer dielectrics and offers a new avenue to enhancing energy storage by tuning the polar topology and thus the polarization characteristics.

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Work Title Phase-Field Simulations of Tunable Polar Topologies in Lead-Free Ferroelectric/Paraelectric Multilayers with Ultrahigh Energy-Storage Performance
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Open Access
Creators
  1. Yiqian Liu
  2. Junfu Liu
  3. Hao Pan
  4. Xiaoxing Cheng
  5. Zijian Hong
  6. Ben Xu
  7. Long-Qing Chen
  8. Ce-Wen Nan
  9. Yuan-Hua Lin
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Advanced Materials
Publication Date 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1002/adma.202108772
Deposited August 11, 2022

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    Acknowledgments
    • Author list: Yiqian Liu, Junfu Liu, Hao Pan, Xiaoxing Cheng, Zijian Hong, Ben Xu, Long-Qing Chen, Ce-Wen Nan, and Yuan-Hua Lin
  • Updated Publisher, Publisher Identifier (DOI), Publication Date Show Changes
    Publisher
    • Advanced Materials
    Publisher Identifier (DOI)
    • https://doi.org/10.1002/adma.202108772
    Publication Date
    • 2022-02
    • 2022
  • Updated Acknowledgments Show Changes
    Acknowledgments
    • Author list: Yiqian Liu, Junfu Liu, Hao Pan, Xiaoxing Cheng, Zijian Hong, Ben Xu, Long-Qing Chen, Ce-Wen Nan, and Yuan-Hua Lin
  • Deleted Creator Sandra Elder
  • Added Creator Yiqian Liu
  • Added Creator Junfu Liu
  • Added Creator Hao Pan
  • Added Creator Xiaoxing Cheng
  • Added Creator Zijian Hong
  • Added Creator Ben Xu
  • Added Creator Long-Qing Chen
  • Added Creator Ce-Wen Nan
  • Added Creator Yuan-Hua Lin
  • Updated