通过面向的一维BZCT@BT核心外填充剂,提高了聚乙合金复合材料的储能性能
Yu Feng1,2, Jun Sun1,2, Zhonghua Zhang1,2
1Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, People's Republic of China.
这项研究开发了用于高性能电容器的先进聚合物介电材料. 这种新材料BZCT@BT/PEI实现了优异的储能密度和充/放电效率,为储能应用提供了一种新的策略.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 聚合物科学 聚合物科学
背景情况:
- 高压和高功率密度介电电容器需要具有优越绝缘和能量储存能力的材料.
- 现有的聚合物介电材料在实现最佳性能方面经常面临限制,原因是介电不匹配和断裂强度问题.
研究的目的:
- 构建一种新的聚合物介电复合材料,以提高储能性能.
- 为了研究酸酸酸 (BZCT) 和酸纤维 (BT) 填充剂对聚乙胺 (PEI) 矩阵特性的影响.
主要方法:
- 使用聚乙烯胺 (PEI) 作为基质和由酸酸纤维 (BZCT@BT) 覆盖的酸酸酸的复合填充剂制造聚合物介电复合材料.
- 在PEI矩阵中,BZCT@BT填充剂含量的系统变化 (0.5%-10%).
- 介电性质的表征,包括放电能量密度 (Ue) 和电荷/放电效率 (η),以及分解强度.
主要成果:
- 优化的 (0.5% BT,10% BZCT@BT/PEI) 复合材料实现了6.66 J/cm3的放电能量密度 (Ue) 和93.29%的充/放电效率 (η).
- 添加BZCT增加了相对介电常数 (εr),而添加BT减轻了介电不匹配引起的电场扭曲.
- 定向纤维填充剂显著提高了聚合物介电体的分解强度.
结论:
- 开发的BZCT@BT/PEI聚合物介电复合材料表现出卓越的储能性能.
- 复合材料为设计高性能储能聚合物介电材料提供了一个有希望的新策略.
- BZCT和BT填充剂的协同效应,以及面向纤维结构,对于改善介电和储能特性至关重要.
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