掺杂电压稳定剂改性聚偏氟乙烯基介电薄膜的储能性能研究  

Study on energy storage performance of polyvinylidene fluoride based dielectric thin films modified by doping voltage stabilizers

作　　者：李琳 郑楷川 马海鑫 牛晟堃 于浩 张健 邢照亮 张天栋 迟庆国[2] LI Lin;ZHENG Kaichuan;MA Haixin;NIU Shengkun;YU Hao;ZHANG Jian;XING Zhaoliang;ZHANG Tiandong;CHI Qingguo(Electric Power Research Institute of State Grid Heilongjiang Electric Power Co.,Ltd.,Harbin 150030,China;Key Laboratory of Engineering Dielectrics and Its Application,Ministry of Education,Harbin University of Science and Technology,Harbin 150080,China;China Electric Power Reserch Institute,Beijing 102209,China)

机构地区：[1]国网黑龙江省电力有限公司电力科学研究院,黑龙江哈尔滨150030 [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,黑龙江哈尔滨150080 [3]中国电力科学研究院有限公司,北京102209

出　　处：《绝缘材料》2025年第4期16-23,共8页Insulating Materials

基　　金：国家电网有限公司科技项目(5500-202430125A-1-1-ZN)。

摘　　要：聚偏氟乙烯的三元共聚物聚(偏氟乙烯-三氟乙烯-氯氟乙烯)(P(VDF-TrFE-CFE),简称PVTC)因具有较高的相对介电常数而有望作为新型电容器薄膜材料。本文首先通过优化薄膜制备的热压工艺来调控PVTC的晶相结构,探讨不同热压温度对PVTC薄膜晶相结构的影响;然后利用溶液流延法制备掺杂低含量电压稳定剂芳香酮类小分子4-丙烯氧基-2-羟基二苯甲酮(ALRB)的PVTC复合薄膜,系统研究ALRB掺杂含量对复合薄膜电学性能的影响规律及机制。结果表明:结果表明:当热压温度为180℃时,PVTC薄膜内部形成了α晶相、β晶相和γ晶相共存的多相结构,对其介电性能和储能性能提升效果显著。适量的电压稳定剂ALRB能够耗散高能电子能量,提高PVTC薄膜的绝缘性能。当ALRB质量分数为0.5%时,PVTC/ALRB复合薄膜的电气强度达到了485.7 kV/mm,储能密度和充放电效率分别为12.12 J/cm^(3)和64.4%。The ternary copolymer of polyvinylidene fluoride,poly(vinylidene fluoride trifluoroethylene chlorofluoro-ethylene)(P(VDF-TrFE-CFE),abbreviated as PVTC)is expected to be used as a new type of capacitor film material due to its high relative dielectric constant.In this paper,the crystal phase structure of PVTC was regulated by optimizing the hot pressing process of thin film preparation,and the influence of different hot pressing temperatures on the crystal phase structure of PVTC thin films was discussed.Then,PVTC composite films doped with low content voltage stabilizer aromatic ketone small molecule 4-acryloxy-2-hydroxyphenylketone(ALRB)were prepared by solution casting method,and the influence law and mechanism of ALRB doping content on the electrical properties of the composite films were studied systematically.The results show that when the hot pressing temperature is 180℃,a multiphase structure coexisting withαphase,βphase,andγphase is formed inside the PVTC film,which has significant improvement effect on its dielectric properties and energy storage properties.Appropriate amount of voltage stabilizer ALRB can dissipate high-energy electron energy and improve the insulation performance of PVTC films.When the mass fraction of ALRB is 0.5%,the electric strength of PVTC/ALRB composite film reaches 485.7 kV/mm,and the discharge energy density and charge discharge efficiency are 12.12 J/cm^(3) and 64.4%,respectively.

关 键 词：聚(偏氟乙烯-三氟乙烯-氯氟乙烯) 复合薄膜 电压稳定剂 储能性能 

分 类 号：TM215[一般工业技术—材料科学与工程]