PVDF基BT/PMN-PT双组分复合薄膜的储能性能  

Energy storage performance of PVDF-based composite film with BT/PMN-PT two-component ceramic

作　　者：刘欢[1] 张硕[1] 许新刚 林秀娟[1] 黄世峰[1] LIU Huan;ZHANG Shuo;XU Xingang;LIN Xiujuan;HUANG Shifeng(Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学山东省建筑材料制备与测试技术重点实验室,山东济南250022

出　　处：《中南大学学报（自然科学版）》2020年第11期3242-3252,共11页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51702120,51632003,U1806221,U2006218);济南大学科技计划项目(XKY1822)。

摘　　要：为了减弱因巨大介电常数差异而引发的界面问题,将介电常数处于PMN-PT和PVDF之间的BT引入薄膜内部,形成过渡。制备具有核-壳结构的BT@dopa和PMN-PT@dopa颗粒,并将两者作为双组分填料共同引入PVDF基体中,制备具有高介电性能和储能效率的复合薄膜。研究结果表明:相对于单组分的BT@dopa/PVDF薄膜和PMN-PT@dopa/PVDF薄膜,由BT@dopa颗粒和PMN-PT@dopa颗粒与PVDF基体构成的双组分复合薄膜的介电性能和储能性能得到显著提高;在100 Hz时,BT@dopa+PMN-PT@dopa/PVDF体积分数为10%的双组分复合薄膜的介电常数为17.9,是BT@dopa/PVDF复合薄膜的1.77倍;当BT@dopa和PMN-PT@dopa体积分数为3%时,双组分复合薄膜击穿场强达到350 k V/mm,同时双组分复合薄膜储能密度达到10.01 J/cm3,放电效率为50.5%。The transition formed inside the film by BT of dielectric constant between PMN-PT and PVDF was utilized to cope with the interface problems caused by the huge difference in dielectric constant.BT@dopa and PMN-PT@dopa with core-shell structure were prepared and were used as two-component fillers to be introduced into PVDF together to prepare high-quality composite films.The results show that BT@dopa+PMN-PT@dopa/PVDF two-component composite films are significantly improved in terms of dielectric properties and energy storage properties relative to one-components BT@dopa/PVDF and PMN-PT@dopa/PVDF.The dielectric constant of the 10%(volume fraction)BT@dopa+PMN-PT@dopa/PVDF two-component composite film is 17.9 at 100 Hz,which is 1.77 times higher than that of the BT@dopa/PVDF composite film.Besides,the discharged energy density of composite films with 3%(volume fraction)BT@dopa and PMN-PT@dopa particles achieves 10.01 J/cm3 at 350 kV/mm and maintains a high discharged efficiency of 50.5%.

关 键 词：介电复合薄膜 核-壳结构 介电常数 储能密度 

分 类 号：TB332[一般工业技术—材料科学与工程]