P(VDF-CTFE)/DA@BTO层叠式结构复合薄膜的介电与储能特性研究  

Study on dielectric and energy storage characteristics of P(VDF-CTFE)/DA@BTO laminated composite film

作　　者：熊平[1] 吴睿 马超 徐建华 王桥梅 XIONG Ping;WU Rui;MA Chao;XU Jianhua;WANG Qiaomei(School of Materials and Environmental Engineering,Chengdu Technological University,Chengdu 611730,China;School of Electronic Engineering,Chengdu Technological University,Chengdu 611730,China;School of Network&Communication Engineering,Chengdu Technological University,Chengdu 611730,China;School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]成都工业学院材料与环境工程学院,四川成都611730 [2]成都工业学院电子工程学院,四川成都611730 [3]成都工业学院网络与通信工程学院,四川成都611730 [4]电子科技大学光电科学与工程学院,四川成都610054

出　　处：《绝缘材料》2024年第7期28-35,共8页Insulating Materials

基　　金：国家自然科学基金资助项目(61904020)。

摘　　要：聚偏氟乙烯(PVDF)基聚合物在高储能密度、高脉冲储能领域具有广泛的应用前景。本文采用钛酸钡(BTO)纳米颗粒掺杂聚偏氟乙烯-三氟氯乙烯(P(VDF-CTFE))溶液,采用流延法制备P(VDF-CTFE)/BTO复合薄膜,探讨了不同BTO掺杂含量对复合薄膜微观结构、介电性能、储能特性的影响;采用多巴胺(DA)改性BTO以提升BTO与聚合物基体的相容性,改善复合薄膜的介电常数和电气强度;同时利用薄膜层间“击穿阻碍效应”制备层叠式结构复合薄膜以提升薄膜的储能特性。结果表明:使用DA改性BTO质量分数为10%的P(VDF-CTFE)/DA@BTO复合薄膜作为中间层、P(VDF-CTFE)作为外层制备的PV-BT-PV层叠式三明治结构复合薄膜,介电常数达到10.44,最大电气强度为362.25kV/mm,在500kV/cm电场强度下的充放电效率达到86.63%。Polyvinylidene fluoride(PVDF)-based polymer has promising applications perspectives in the field of high energy storage density and high pulse energy storage.In this paper,barium titanate(BTO)nanoparticles were doped with polyvinylidene fluoride-chlorotrifluoroethylene(P(VDF-CTFE))solution,and P(VDF-CTFE)/BTO composite films were prepared by solution casting method.The effects of different BTO doping contents on microstructure,dielectric properties,and energy storage characteristics of the composite films were investigated.Then the BTO was modified by dopamine(DA)to enhance the compatibility between BTO and polymer matrix and improve the dielectric constant and electric strength of composite films.At the same time,on the basis of the"breakdown blocking effect"between the films layers,the laminated composite films were prepared to enhance the energy storage properties.The results show that using the P(VDF-CTFE)/DA@BTO composite film with a DA modified BTO mass fraction of 10%as the interlayer,and the P(VDF-CTFE)as the outerlayer,the prepared PV-BT-PV laminated sandwich composite film has a dielectric constant of 10.44,a maximum electric strength of 362.25 kV/mm,and a charge discharge efficiency of 86.63%at an electric field strength of 500 kV/cm.

关 键 词：钛酸钡 聚偏氟乙烯-三氟氯乙烯 层叠式结构复合薄膜 介电特性 储能特性 

分 类 号：TM215[一般工业技术—材料科学与工程]