Flexible mica films for high-temperature energy storage

Xinwei Xu; Wenlong Liu; Yi Li; Yifei Wang; Qibin Yuan; Jie Chen; Rong Ma; Feng Xiang; Hong Wang

Journal of Materiomics (Sep 2018)

Flexible mica films for high-temperature energy storage

Xinwei Xu,
Wenlong Liu,
Yi Li,
Yifei Wang,
Qibin Yuan,
Jie Chen,
Rong Ma,
Feng Xiang,
Hong Wang

Affiliations

Xinwei Xu: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Wenlong Liu: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Yi Li: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Yifei Wang: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Qibin Yuan: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Jie Chen: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Rong Ma: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Feng Xiang: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Hong Wang: State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China; Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China; Corresponding author. Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.

Journal volume & issue: Vol. 4, no. 3
pp. 173 – 178

Abstract

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Dielectrics used for energy storage are highly desired for power electronics and pulse power applications and the polymer capacitors are the main commercial ones available. The development of flexible electronics and wearable devices require the relative materials being flexible. Besides, high temperature resistance is also desired because of the rising demand for high power devices and large electricity under elevated temperature. The polymer dielectrics for polymer capacitors are flexible but with relatively low working temperature normally less than 100 °C. Therefore, fabricating a dielectric material to satisfy the flexibility and high working temperature simultaneously is still a great challenge. Here we propose one solution by demonstrating a hand-exfoliated fluorophlogopite film with micrometer scale thickness. Among which, the mica film with a thickness of around 10 μm (Mica-10) exhibits the inorganic-like temperature stability even polymer-like flexibility. From 25 °C to 200 °C, Mica-10 has an energy density of around 11.27 J/cm3 with a variation within 2%, accompanied by a charge-discharge efficiency of around 95% at an electric field of 500 MV/m. Meanwhile, the thin thickness makes Mica-10 flexible, enabling its excellent flexibility and durability. This work revives the traditional material, mica, providing a way for high-temperature energy storage applications. Keywords: Dielectric, Mica, Energy storage, High temperature, Flexible

Published in Journal of Materiomics

ISSN: 2352-8478 (Print); 2352-8486 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.sciencedirect.com/journal/journal-of-materiomics

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