Improved high‐temperature energy storage density at low‐electric field in BOPP/PVDF multilayer films
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Published:2023-09-28
Issue:48
Volume:140
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:
Zhang Tiandong1,
Liang Shuang1,
Yu Hainan1,
Zhang Changhai1,
Tang Chao1,
Li Hua1,
Chi Qingguo1ORCID
Affiliation:
1. Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education Harbin University of Science and Technology Harbin China
Abstract
AbstractBiaxially oriented polypropylene (BOPP) is the most favorable commercial dielectric energy storage film due to its low dielectric loss and high electric breakdown strength. However, its low dielectric constant always leads to relatively low energy storage density. In this study, we propose an efficient strategy to increase the dielectric constant of BOPP films by laminating with high dielectric polyvinylidene fluoride (PVDF). Utilizing the high dielectric constant of PVDF and optimizing its thickness and layers, the high‐temperature energy storage density at low‐electric field is significantly improved. When the thickness of interlayer PVDF is 5 μm and the total number of stacked layers is 7, the BOPP/PVDF multilayer films deliver excellent high‐temperature energy storage performance. The dielectric constant of BOPP/PVDF multilayer films increases to 3.54, 1.74 times higher than pure BOPP films. At a low electric field of 200 kV/mm, the discharged energy storage density of BOPP/PVDF multilayer films increases to 1.02 and 0.99 J/cm3 at 100 and 125°C. (BOPP ~0.50 and 0.48 J/cm3@200 kV/mm). This work provides an efficient way to improve the high‐temperature energy storage density of BOPP films by constructing all‐organic multilayer structure.
Funder
China Postdoctoral Science Foundation
Heilongjiang Provincial Postdoctoral Science Foundation
Natural Science Foundation of Heilongjiang Province
Subject
Materials Chemistry,Polymers and Plastics,Surfaces, Coatings and Films,General Chemistry