TY - JOUR
T1 - Ultrahigh Energy Storage Density in Glassy Ferroelectric Thin Films under Low Electric Field
AU - Sun, Yunlong
AU - Zhang, Le
AU - Huang, Qianwei
AU - Chen, Zibin
AU - Wang, Dong
AU - Seyfouri, Mohammad Moein
AU - Chang, Shery L.Y.
AU - Wang, Yu
AU - Zhang, Qi
AU - Liao, Xiaozhou
AU - Li, Sean
AU - Zhang, Shujun
AU - Wang, Danyang
N1 - Funding Information:
Y.S. and L.Z. contributed equally to this work. The financial support of the Australian Research Council (FT180100541, DP190101155, DP220103229), National Natural Science Foundation of China (grant nos. 52171012, 52102146), and Fundamental Research Funds for the Central Universities of China (D5000210491) are acknowledged. This work was performed in part at the New South Wales node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano‐ and microfabrication facilities for Australia's researchers. The authors also acknowledge the facilities and the scientific and technical assistance of the Microscopy Australia node at the University of Sydney (Sydney Microscopy & Microanalysis) and Electron Microscope Unite (EMU), Mark Wainwright Analytical Centre at the University of New South Wales. The authors also thank Shihui Feng and Cheuk‐Wai Tai at Stockholm University, Sweden for providing preliminary TEM results. The facility at Ernst‐Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Juelich is also acknowledged. Z.B.C. would like to express his sincere thanks to the financial support from the Research Office (Project code: P0039581 and P0042733) of The Hong Kong Polytechnic University.
Funding Information:
Y.S. and L.Z. contributed equally to this work. The financial support of the Australian Research Council (FT180100541, DP190101155, DP220103229), National Natural Science Foundation of China (grant nos. 52171012, 52102146), and Fundamental Research Funds for the Central Universities of China (D5000210491) are acknowledged. This work was performed in part at the New South Wales node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australia's researchers. The authors also acknowledge the facilities and the scientific and technical assistance of the Microscopy Australia node at the University of Sydney (Sydney Microscopy & Microanalysis) and Electron Microscope Unite (EMU), Mark Wainwright Analytical Centre at the University of New South Wales. The authors also thank Shihui Feng and Cheuk-Wai Tai at Stockholm University, Sweden for providing preliminary TEM results. The facility at Ernst-Ruska Centre for Microscopy and Spectroscopy with Electrons, Forschungszentrum Juelich is also acknowledged. Z.B.C. would like to express his sincere thanks to the financial support from the Research Office (Project code: P0039581 and P0042733) of The Hong Kong Polytechnic University.
Publisher Copyright:
© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.
PY - 2022/11/3
Y1 - 2022/11/3
N2 - The current approach to achieving superior energy storage density in dielectrics is to increase their breakdown strength, which often incurs heat generation and unexpected insulation failures, greatly deteriorating the stability and lifetime of devices. Here, a strategy is proposed for enhancing recoverable energy storage density (Wr) while maintaining a high energy storage efficiency (η) in glassy ferroelectrics by creating super tetragonal (super-T) nanostructures around morphotropic phase boundary (MPB) rather than exploiting the intensely strong electric fields. Accordingly, a giant Wr of ≈86 J cm−3 concomitant with a high η of ≈81% is acquired under a moderate electric field (1.7 MV cm−1) in thin films having MPB composition, namely, 0.94(Bi, Na)TiO3-0.06BaTiO3 (BNBT), where the local super-T polar clusters (tetragonality ≈1.25) are stabilized by interphase strain. To the knowledge of the authors, the Wr of the engineered BNBT thin films represents a new record among all the oxide perovskites under a similar strength of electric field to date. The phase field simulation results ascertain that the improved Wr is attributed to the local strain heterogeneity and the large spontaneous polarization primarily is originated from the super-T polar clusters. The findings in this work present a genuine opportunity to develop ultrahigh-energy-density thin-film capacitors for low-electric-field-driven nano/microelectronics.
AB - The current approach to achieving superior energy storage density in dielectrics is to increase their breakdown strength, which often incurs heat generation and unexpected insulation failures, greatly deteriorating the stability and lifetime of devices. Here, a strategy is proposed for enhancing recoverable energy storage density (Wr) while maintaining a high energy storage efficiency (η) in glassy ferroelectrics by creating super tetragonal (super-T) nanostructures around morphotropic phase boundary (MPB) rather than exploiting the intensely strong electric fields. Accordingly, a giant Wr of ≈86 J cm−3 concomitant with a high η of ≈81% is acquired under a moderate electric field (1.7 MV cm−1) in thin films having MPB composition, namely, 0.94(Bi, Na)TiO3-0.06BaTiO3 (BNBT), where the local super-T polar clusters (tetragonality ≈1.25) are stabilized by interphase strain. To the knowledge of the authors, the Wr of the engineered BNBT thin films represents a new record among all the oxide perovskites under a similar strength of electric field to date. The phase field simulation results ascertain that the improved Wr is attributed to the local strain heterogeneity and the large spontaneous polarization primarily is originated from the super-T polar clusters. The findings in this work present a genuine opportunity to develop ultrahigh-energy-density thin-film capacitors for low-electric-field-driven nano/microelectronics.
KW - energy storage
KW - glassy ferroelectrics
KW - lead-free thin films
KW - morphotropic phase boundary
KW - super tetragonal nanostructures
UR - http://www.scopus.com/inward/record.url?scp=85138166497&partnerID=8YFLogxK
U2 - 10.1002/advs.202203926
DO - 10.1002/advs.202203926
M3 - Journal article
AN - SCOPUS:85138166497
SN - 2198-3844
VL - 9
JO - Advanced Science
JF - Advanced Science
IS - 31
M1 - 2203926
ER -