Significantly enhanced high-temperature capacitive energy storage in cyclic olefin copolymer dielectric films via ultraviolet irradiation†

IF 10.7 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Horizons Pub Date : 2023-03-14 DOI:10.1039/D3MH00078H

Zhiwei Bao, Song Ding, Zhizhan Dai, Yiwei Wang, Jiangheng Jia, Shengchun Shen, Yuewei Yin and Xiaoguang Li

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引用次数: 2

Abstract

Polymer dielectrics with high operation temperature (～150 °C) and excellent capacitive energy storage performance are vital for electric power systems and advanced electronic devices. Here, a very convenient and competitive strategy by preparing ultraviolet-irradiated cyclic olefin copolymer films is demonstrated to be effective in improving the energy storage performance at high temperatures. Compared with the unirradiated film, irradiated films exhibit a higher dielectric constant, higher breakdown strength and stronger mechanical properties as a result of the emergence of the carbonyl group and cross-linking network. Consequently, with a high efficiency above 95%, a superior discharged energy density of ～3.34 J cm^?3 is achieved at 150 °C, surpassing the current dielectric polymers and polymer nanocomposites. In particular, the energy storage performance remains highly reliable over 20?000 cycles under actual operating conditions (200 MV m^?1 at 150 °C) in hybrid electric vehicles. This research offers a valuable pathway to build high-energy-density polymer-based capacitor devices working under harsh environments.

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紫外辐照显著增强了环烯烃共聚物介质膜的高温电容储能性能

具有高工作温度(~150°C)和优异电容储能性能的聚合物介电材料对于电力系统和先进的电子设备至关重要。本文提出了一种制备紫外辐照环烯烃共聚物薄膜的方法，该方法可以有效地提高环烯烃的高温储能性能。与未辐照膜相比，辐照膜由于羰基和交联网络的出现，具有更高的介电常数、更高的击穿强度和更强的力学性能。因此，在95%以上的高效率下，优越的放电能量密度为~3.34 J cm?3 .在150°C下实现，超越了目前的介电聚合物和聚合物纳米复合材料。特别是，储能性能在20?在实际操作条件下(200mv m?1在150°C)的混合动力电动汽车。该研究为构建在恶劣环境下工作的高能量密度聚合物电容器器件提供了一条有价值的途径。

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来源期刊

Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

18.90

自引率

2.30%

发文量

306

审稿时长

1.3 months

期刊介绍： Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.