Al2O3/PEI复合介质的高温储能特性研究

doi:10.11896/cldb.23110021

材料导报

2024, Vol. 38

Issue (22): 23110021-8 https://doi.org/10.11896/cldb.23110021

高分子与聚合物基复合材料

Al₂O₃/PEI复合介质的高温储能特性研究

孟令欣¹, 邓伟^1,2,*, 胡思远¹, 冯嘉唯¹, 王照盼¹

1 哈尔滨理工大学材料科学与化学工程学院,哈尔滨 150040
2 哈尔滨理工大学工程电介质及其应用教育部重点实验室,哈尔滨 150080

Research on High Temperature Energy Storage Characteristics of Al₂O₃/PEI Dielectric Composites

MENG Lingxin¹, DENG Wei^1,2,*, HU Siyuan¹, FENG Jiawei¹, WANG Zhaopan¹

1 School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
2 Key Laboratory of Engineering Dielectrics and Its Application, Ministry of Education, Harbin University of Science and Technology, Harbin 150080, China

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摘要高温储能的电介质材料对电子电力设备容量和可靠性的提升、体积的减小具有重要意义。以耐高温的聚醚酰亚胺(PEI)为基体,宽带隙的氧化铝(Al₂O₃)为填料,通过溶液共混再流延制备Al₂O₃/PEI复合薄膜,对比研究了Al₂O₃纳米粒子(AO NPs)和静电纺Al₂O₃纤维(AO NFs)对复合薄膜介电储能特性的影响。结果表明,Al₂O₃能够兼顾提升PEI复合薄膜的极化强度和击穿场强,降低电导率。相较于AO NPs,AO NFs在PEI基体中的分散更为均匀,可在极低填料含量下获得具有优异储能特性的Al₂O₃/PEI复合薄膜。当填料含量为0.5%(如无特别说明,均为体积分数)时,AO NFs/PEI在25 ℃的储能密度达5.80 J/cm³,分别是0.50AO NPs/PEI和纯PEI薄膜的1.2倍和2.5倍。150 ℃下0.50AO NFs/PEI仍表现出优异的储能特性,储能密度和充放电效率分别为4.36 J/cm³和75%。

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关键词: 聚醚酰亚胺氧化铝纤维高温介电性能储能密度

Abstract: High temperature energy storage dielectric materials are of great significance for improving the capacity and reliability of electronic and power equipment, as well as reducing their volume. In this work, aluminum oxide/polyether imide (Al₂O₃/PEI) composite films were obtained via solution blending and casting method using high-temperature resistant PEI as the matrix and Al₂O₃ with wide bandgap as the fillers. The effects of alumina nanoparticles (AO NPs) and electrospun alumina nanofibers (AO NFs) on the dielectric energy storage characteristics of the composite films were studied comparatively. The results show that Al₂O₃ can improve polarization and breakdown strength simultaneously, as well as decrease conductivity. Compared with AO NPs, AO NFs are more evenly dispersed in the PEI matrix, thus obtaining high energy storage Al₂O₃/PEI composite films at extremely low filler content. When the filler content is 0.50%, the energy storage density of AO NFs/PEI at 25 ℃ reaches 5.80 J/cm³, which is 1.2 and 2.5 times higher than that of 0.50AO NPs/PEI and pure PEI films, respectively. Furthermore, 0.50AO NFs/PEI composite films still exhibit excellent energy storage characteristics at 150 ℃, with energy storage density and charge discharge efficiency of 4.36 J/cm³ and 75%, respectively.

Key words: polyetherimide alumina nanofibers high temperature dielectric property energy storage density

出版日期: 2024-11-25 发布日期: 2024-11-22

ZTFLH:

TB332

基金资助: 黑龙江省自然科学基金(LH2019E059);国家自然科学基金(U20A20307)

通讯作者: *邓伟,工学博士,哈尔滨理工大学材料科学与化学工程学院副教授、硕士研究生导师。主持及参与黑龙江省自然科学基金项目、国家自然科学基金项目、山东省重点研发计划项目等。目前主要从事聚合物基复合介电材料和高压电缆绝缘材料等方面的研究工作。发表SCI收录论文20余篇,包括Journal of Colloid and Interface Science、European Polymer Journal等。weideng@hrbust.edu.cn

作者简介: 孟令欣,2020年6月毕业于哈尔滨理工大学材料科学与工程学院,获得工学学士学位。现为哈尔滨理工大学材料科学与化学工程学院硕士研究生,在邓伟副教授的指导下进行研究。目前主要研究领域为聚合物基高温介电储能复合材料。

引用本文:

孟令欣, 邓伟, 胡思远, 冯嘉唯, 王照盼. Al₂O₃/PEI复合介质的高温储能特性研究[J]. 材料导报, 2024, 38(22): 23110021-8.
MENG Lingxin, DENG Wei, HU Siyuan, FENG Jiawei, WANG Zhaopan. Research on High Temperature Energy Storage Characteristics of Al₂O₃/PEI Dielectric Composites. Materials Reports, 2024, 38(22): 23110021-8.

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http://www.mater-rep.com/CN/10.11896/cldb.23110021 或 http://www.mater-rep.com/CN/Y2024/V38/I22/23110021

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