Significantly improved high-temperature energy storage performance of commercial BOPP films by utilizing ultraviolet grafting modification

作     者：Qingguo Chi Tianqi Wang Changhai Zhang Hainan Yu Xindong Zhao Xu Yang Qingquan Lei Hong Zhao Tiandong Zhang 

作者机构：Key Laboratory of Engineering Dielectrics and Its ApplicationMinistry of EducationHarbin University of Science and TechnologyHarbin 150080China School of Electrical and Electronic EngineeringHarbin University of Science and TechnologyHarbin 150080China 

出 版 物：《iEnergy》 (电力能源汇刊（英文）)

年 卷 期：2022年第1卷第3期

页      面：374-382页

核心收录：

学科分类：081702[工学-化学工艺] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.U20A20308,51977050) Heilongjiang Provincial Natural Science Foundation of China(No.ZD2020E009) China Postdoctoral Science Foundation(Nos.2021T140166,2018M640303) University Nursing Program for Young Scholars with Creative Talents in Heilongjiang(Nos.UNPYSCT-2020178,UNPYSCT-2020180) 

主　　题：Capacitors BOPP ultraviolet irradiation graft modification energy storage. 

摘      要：Commercial biaxially oriented polypropylene(BOPP)film capacitors have been widely applied in the fields of electrical and electronic ***,due to the sharp increase in electrical conduction loss as the temperature rises,the energy storage performance of BOPP films seriously degrades at elevated *** this study,the grafting modification method is facile and suitable for large-scale industrial manufacturing and has been proposed to increase the high-temperature energy storage performance of com-mercial BOPP films for the first ***,acrylic acid(AA)as a polar organic molecular is used to graft onto the surface of commercial BOPP films by using ultraviolet irradiation(abbreviated as BOPP-AA).The results demonstrate that the AA grafting modification not only slightly increases the dielectric constant,but also significantly reduces the leakage current density at high-temperature,greatly improving the high-temperature energy storage *** modified BOPP-AA films display a discharged energy density of 1.32 J/cm3 with an efficiency of90%at 370 kV/mm and 125℃℃,which is 474%higher than that of the pristine BOPP *** work manifests that utilizing ultraviolet grafting modification is a very efficient way to improve the high-temperature energy storage performance of commercial BOPP films as well as provides a hitherto unexplored opportunity for large-scalable production applications.