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新型聚乙胺介电剂:分子设计,能量储存特性和自我愈合性能

Shimo Cao^1,2, Hui Tong¹, Silin Wang^1,2

¹Institute of Electrical Engineering, Chinese Academy of Science, Beijing, 100190, China.

Macromolecular rapid communications

|September 10, 2023

概括

耐高温聚乙胺 (PEI) 介电薄膜是为金属化薄膜电容器开发的. PEI-8在高温下表现出极好的自我愈合和稳定的电特性,使其适用于恶劣的环境.

科学领域:

材料科学材料科学材料科学
电气工程电气工程

背景情况:

金属化薄膜电容器需要耐高温介电材料,具有自我修复能力,以提高性能和寿命.
现有的介电材料在高温应用和自我修复效率方面经常面临局限性.

研究的目的:

设计和制造一系列聚乙胺 (PEI) 介电薄膜,以提高耐高温和介电性能.
研究PEI介电材料的自我愈合行为和电性能,用于金属化膜电容器应用.

主要方法:

制造具有不同极群和柔性以太结合的聚乙胺 (PEI) 介电薄膜.
介电性质的表征,包括电容性和散射因子.
在高温下 (150°C) 评估韦布尔分解强度和介电分解.
分析电位移-电场 (D-E) 循环和自愈性能.

主要成果:

PEI介电材料的电容性为3.53-4.00,散射系数为0.281-0.517%,韦布尔分解强度为347-674 MV m-1.
PEI-8 (BPADA-MDA) 在150°C时表现出稳定的分解强度和高电荷-放电效率.
基于PEI-8的电容器表现出良好的自我愈合性能,其特点是清晰的形态,高断电压和降低的自我愈合能量.

结论:

聚乙胺 (PEI) 介电材料,特别是PEI-8,在高温金属化薄膜电容应用中显示出显著的前景.
在PEI中加入极群和以太链接可以增强介电性质和自我愈合能力.
由于PEI-8的强大性能,它是运行在恶劣环境条件下的电容器的强大候选者.

关键词:

介电性质介电性质介电性质储能储能是一种储能.聚乙烯胺的使用方法自治行为是自我治愈的行为.

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