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由抗塑化形成的双连续相网提高了聚乙胺介电膜中的能量储存性能

Xin Li¹, Le Zhou¹, Yao Xiao¹

¹School of Materials Science and Engineering, State Key Lab of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|September 15, 2025

概括

研究人员通过向聚乙胺 (PEI) 添加增塑剂开发了一种新型聚合物复合物. 这种复合材料增强了介电常数和分解强度,提高了储能能力,特别是在高温下.

科学领域:

材料科学材料科学材料科学
聚合物科学聚合物科学
电气工程电气工程

背景情况:

聚合物介电材料对于电子储能至关重要,因为其高分解强度 (Eb) 和功率密度.
它们的性能受到低介电常数 (εr) 和在高温下降 Eb 的限制,这给同时改进带来了挑战.
εr 和 Eb 之间存在反向关系,需要创新的增强策略.

研究的目的:

在聚合物介电材料中,解离介电常数 (εr) 和分解强度 (Eb) 之间的反向关系.
开发高性能聚合物介电材料,用于苛刻的电子储能应用.
制造具有更好的能量储存密度和热稳定性的聚合物复合材料.

主要方法:

将低含量的增塑剂纳入聚乙胺 (PEI) 基质中,以制造复合材料.
使用抗塑化在聚合物矩阵内形成双连续相网络.
利用偏振差来实现电场再分配和接口偏振.

主要成果:

成功形成了一个双连续相网,包括介电和绝缘相.
由于电场再分配和接口极化,复合材料表现出增强的介电常数 (εr) 和断裂强度 (Eb).
实现了4.88 J cm-3的放电能量密度 (Ud),90%的效率 (η) 和卓越的热稳定性 (150°C的105个循环).

结论:

该研究提出了一种有希望的策略,用于克服聚合物介电材料中 εr 和 Eb 之间的反向关系.
通过抗塑化进行相位结构调制是制造高温聚合物介电物的有效方法.
开发的基于PEI的复合材料显示了先进电子储能应用的巨大潜力.

关键词:

抗塑化方法抗塑化方法双连续相位网络的网络.介电性质介电性质介电性质高温储能储能储能储能储能聚合物复合物的聚合物复合物.

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