Side-Chain-Type Polyimide-Cu Complexes with Suppressed Activation Energy of Relaxation for Advanced High-Temperature Capacitor  

作　　者：Bai-Yang Zhou Ze-Tong Ma Shi-Long Zhong Zhen-Jie Huang Qi Guo Deng-Chong Feng Zhong-Ke Yuan Shao-Lin Lu Yu-Zhao Yang Cheng Wang Ding-Shan Yu Xu-Dong Chen 

机构地区：[1]Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education,Guangdong Engineering Technology Research Centre for High Performance Organic and Polymer Photoelectric Functional Films,School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China [2]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China [3]Guangdong Provincial Laboratory of Chemistry and Fine Chemical Industry Jieyang Centre,Jieyang 515200,China [4]Chemistry and Chemical Engineering Guangdong Laboratory,Shantou 515031,China

出　　处：《Chinese Journal of Polymer Science》2024年第8期1038-1048,共11页高分子科学（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2023YFB3812400);the National Natural Science Foundation of China(No.52303370);the Special Fund for the Sci-tech Innovation Strategy of Guangdong Province(No.STKJ202209082)。

摘　　要：The burgeoning growth of the new energy vehicles and aviation industry has escalated the need for energy storage capacitors capable of stable operation in harsh environments.The advent of metal-polyimide complexes has illuminated a novel approach for preparing tem perature-resistant capacitors.However,the general application of these metal-polyimide com plexes is impeded by the high dielectric loss and low breakdown strength,consequences of main-chain coordination and excessive metal ions content.Herein,our study proposes a novel polyimideCu complex material(POP-Cu)predicated on side-chain-type pyridine-Cu coordination,utilizing the structural backbone PMDA-ODA of mature commercial PI(Kapton)with reliable performance.Owing to the high degree of freedom afforded by the side chain with suppressed relaxation activation energy and the long-range electron delocalization formed by d-πcoordination,the dielectric constant of this material containing merely 2.7 mol%Cu increases from 3.25(POPI)to 5.58,while maintaining a remarkably low dielectric loss of 0.0066.Meanwhile,this material exhibits a substantial DC breakdown strength of 436.2 MV·m^(-1)and a high energy density of 5.42 J·cm^(-3),coupled with superior mechanical and thermal properties.Even at 150℃,it retains over 90%of its room-temperature energy density,demon strating notable dielectric stability under high temperatures.These attributes underscore its promising application for capacitors operating in harsh environments.

关 键 词：Dielectric performance Polyimide complexes Side-Chain-Type High-temperature capacitor 

分 类 号：TM53[电气工程—电器] O641.4[理学—物理化学]