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Journal of Advanced Ceramics 2023, 12(1): 145-154 https://doi.org/10.26599/JAC.2023.9220673
Research Article | Open Access | Issue | Published: 09 December 2022

Nanonet-/fiber-structured flexible ceramic membrane enabling dielectric energy storage

Show Author's Information Lvye DOU,  Bingbing YANG,  Shun LAN,  Yiqian LIU,  Yuan-Hua LIN( ),  Ce-Wen NAN
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Keywords:
flexible, mechanically robust, BiFeO3/SiO2 dual-network, dielectric energy storage
Cite this article:
DOU L, YANG B, LAN S, et al. Nanonet-/fiber-structured flexible ceramic membrane enabling dielectric energy storage. Journal of Advanced Ceramics, 2023, 12(1): 145-154. https://doi.org/10.26599/JAC.2023.9220673
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Abstract Full text Electronic supplementary material About this article

Ceramics are considered intrinsically brittle at macro scale due to the lack of slip mechanism and pre-existing defects, which greatly limits their potential applications in emerging fields including wearable electronic devices and flexible display. In this contribution, we developed BiFeO3/SiO2 dual-networks with exceptional flexibility through a coupled electronetting/electrospun method. The hybrid nanostructured networks endow the material with high tensile strength (2.7 MPa), excellent flexibility (80% recoverable deformation), and robust fatigue resistance performance (maintain flexibility after a 1000-cyclic compress test). After in-situ compounded with dielectric polymer via a layer-by-layer solution casting method, the resultant three-dimensional (3D) composite film exhibits a twice higher dielectric constant (εr) than polyether imide (PEI) film. More importantly, the breakdown strength of the 3D composite film is almost the same as that of the PEI film, resulting in an enhanced energy density of ~6.0 J/cm3 and a high efficiency of 80% at 4.58 MV/cm. The unique structure, combined with the excellent balance between mechanical and dielectric properties in flexible structures, is of critical significance to the design of flexible functional ceramics and broadening their applications in wearable electric devices.


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About this article

Nanonet-/fiber-structured flexible ceramic membrane enabling dielectric energy storage

Show Author's information Lvye DOU, Bingbing YANG, Shun LAN, Yiqian LIU, Yuan-Hua LIN( ), Ce-Wen NAN
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China

Abstract

Ceramics are considered intrinsically brittle at macro scale due to the lack of slip mechanism and pre-existing defects, which greatly limits their potential applications in emerging fields including wearable electronic devices and flexible display. In this contribution, we developed BiFeO3/SiO2 dual-networks with exceptional flexibility through a coupled electronetting/electrospun method. The hybrid nanostructured networks endow the material with high tensile strength (2.7 MPa), excellent flexibility (80% recoverable deformation), and robust fatigue resistance performance (maintain flexibility after a 1000-cyclic compress test). After in-situ compounded with dielectric polymer via a layer-by-layer solution casting method, the resultant three-dimensional (3D) composite film exhibits a twice higher dielectric constant (εr) than polyether imide (PEI) film. More importantly, the breakdown strength of the 3D composite film is almost the same as that of the PEI film, resulting in an enhanced energy density of ~6.0 J/cm3 and a high efficiency of 80% at 4.58 MV/cm. The unique structure, combined with the excellent balance between mechanical and dielectric properties in flexible structures, is of critical significance to the design of flexible functional ceramics and broadening their applications in wearable electric devices.

Keywords: flexible, mechanically robust, BiFeO3/SiO2 dual-network, dielectric energy storage

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Publication history

Received: 07 September 2022
Revised: 28 September 2022
Accepted: 06 October 2022
Published: 09 December 2022
Issue date: January 2023

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© The Author(s) 2022.

Acknowledgements

This work was supported by the National Key R&D Program of China (No. 2021YFB3800601), the National Natural Science Foundation of China (No. 52102275), China Postdoctoral Science Foundation (Nos. 2021TQ0163 and 2021M701821), the Open Youth Fund project of Foshan (South China) Institute of New Materials (No. 2021AYF25011), and Shuimu Tsinghua Scholar Program.

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