Improvement of high‐temperature energy storage properties of polyimide‐based nanocomposites with sandwich structure
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Published:2023-11-12
Issue:4
Volume:141
Page:
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ISSN:0021-8995
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Container-title:Journal of Applied Polymer Science
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language:en
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Short-container-title:J of Applied Polymer Sci
Author:
Ren Sen1,
Pang Lixia1,
Wang Xiaolong1,
Fang Zhen1,
Zhou Di2ORCID,
Zhao Yuanjie1,
Li Wenbo1
Affiliation:
1. Laboratory of Thin Film Techniques and Optical Test Xi'an Technological University Xi'an Shaanxi China
2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research School of Electronic and Information Engineering, Xi'an Jiaotong University Xi'an China
Abstract
AbstractThe demand for dielectric materials that have high energy and power density properties, and are operational at high temperature has increased with the advancement in new energy technology, high‐end microelectronics, and other industries. Pure ceramic and polymer capacitors are not enough to meet the ever increasing energy requirements in a wide range of applications. In this article, we report a sandwich structure nanocomposite film based on polyimide (PI) with high breakdown strength SiO2/PI as the outer layers and high dielectric constant strontium titanate (SrTiO3)/PI as the sandwich layer. The results showed that the prepared composites can obtain high energy storage density and low dielectric loss at high temperatures. The composites achieved an energy storage density of 5.5 J cm−3 and a dielectric loss of 0.004 at a temperature of 150°C when the filling amount of SrTiO3 was 0.5 vol% and the filling amount of SiO2 was 3 vol%. This work shows that the composites are promising dielectrics for applications at high temperature and provides a new idea for high‐temperature energy storage devices.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry