调控链段饱和度提高环氧电极化储能薄膜综合储能性能  

Improvement in the Comprehensive Energy Storage Performance of Epoxy Electrically Polarized Energy Storage Films by Modifying the Chain Segment Saturation

作　　者：毛佳乐 马文杰 王双 李敬 张磊[1] 成永红[1] MAO Jiale;MA Wenjie;WANG Shuang;LI Jing;ZHANG Lei;CHENG Yonghong(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2023年第3期1095-1104,共10页High Voltage Engineering

基　　金：国家自然科学基金(52130703);陕西省重点研发计划项目(2022GY-369);中央高校基本科研业务费专项资金(xzy0122022059)。

摘　　要：新能源系统、电动汽车等环保产业的飞速发展,要求系统内电容器储能介质在宽的温度范围内具有稳定且高的储能密度和储能效率。现阶段常用的双轴拉伸聚丙烯(biaxially oriented polypropylene,BOPP)薄膜因其储能密度低,工作温度低,难以满足日益增长的储能设备需求,使得开发新型聚合物介质储能薄膜成为研究热点。为此基于前期研究的具有优异常温储能性能的环氧电极化储能薄膜,通过调控环氧薄膜分子结构内苯环和脂肪环的配比调控链段饱和度进而提高其综合储能性能。研究表明,基体采用环氧树脂,芳香胺固化剂完全或者部分采用脂肪环固化剂替代,一定程度上降低环氧储能薄膜的饱和度,可以既保证其有较高的工作温度,又具有稳定且极高的储能效率,达到在100℃下获得2.1 J/cm^(3)的情况下同时保持高达99%的储能效率。最后,通过漏电流和高电压介电谱分析环氧薄膜的损耗机理,发现分子结构中苯环和氢化苯环造成损耗的方式不同,进一步证实了通过调控分子链段饱和度提高环氧薄膜综合储能性能的可行性。With rapid developments of new energy systems,electric vehicles and other environmental protection industries,capacitor energy storage mediums are required to have stable and high energy storage density,as well as high energy storage efficiency in a wide temperature range.The commonly used BOPP film is difficult to meet the growing demands for energy storage equipment due to its low energy storage density and narrow working temperature,thus the development of new polymeric medium energy storage film becomes a research hotspot.Based on the previous research on the epoxy electrically polarized energy storage films with excellent energy storage performance at abnormal temperature,the comprehensive energy storage performance is further improved by adjusting the segment saturation,which is controlled by the ratio of benzene ring and hydrogenated bene ring in the molecular structure of epoxy.The research shows that,when epoxy resin is used as the matrix,and aromatic amine curing agent is completely or part replaced by aliphatic ring curing agent,not only a high working temperature can be ensured,but also stable and extremely-high energy storage efficiency can be reached,reaching 2.1 J/cm^(3) at 100℃while maintaining a high energy efficiency of 99%.At last,the loss mechanism of the epoxy films with different segment saturation are analyzed by leakage current and high-voltage dielectric spectroscopy.It is found that the loss modes of the benzene ring and hydrogenated bene ring are different,which further confirm the feasibility of improving the comprehensive energy storage performance of the epoxy film by regulating the saturation of molecular chain segments.

关 键 词：环氧储能薄膜 链段饱和度 储能效率 漏电流 高压介电损耗 

分 类 号：TM53[电气工程—电器] TB383.2[一般工业技术—材料科学与工程]