二维单层DOPA@Ti_(0.87)O_(2)/PVDF柔性复合膜的制备及其储能性能研究  

Fabrication of Ti_(0.87)O_(2)/PVDF Flexible Film and Their Energy Storage Density Properties

作　　者：孙溢 王璐 祁宏祥 汪聪 陈家钰 李宝文 张树君 SUN Yi;WANG Lu;QI Hong-xiang;WANG Cong;CHEN Jia-yu;LI Bao-wen;ZHANG Shu-jun(School of Material Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Institute for Superconducting and Electronic Materials,Australian Institute of Innovative Materials,University of Wollongong,NSW2500,Australia)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]卧龙岗大学超导与电子材料研究所,卧龙岗2500

出　　处：《武汉理工大学学报》2020年第5期12-16,共5页Journal of Wuhan University of Technology

基　　金：国家自然科学基金(51872214)。

摘　　要：为了进一步提升薄膜电容器的储能密度,在聚合物中添加陶瓷填料成为一种常见的手段。相对颗粒填料,异性填料(纤维,纳米片)能更有效阻碍复合材料内部形成击穿路径,从而能大幅提升复合材料的击穿场强和储能密度。然而,在有机/无机复合体系中,由于两相材料的界面不相容,限制了复合材料储能密度的提升。因此,利用DOPA对液相剥离的Ti_(0.87)O_(2)纳米片进行包覆,制备出DOPA@Ti_(0.87)O_(2)纳米片,以改善填料在聚偏氟乙烯内部的相容性。实验结果表明,DOPA包覆的Ti_(0.87)O_(2)填料能改善复合膜的储能效率,DOPA@Ti_(0.87)O_(2)/PVDF复合膜的储能效率达到70%,相比Ti_(0.87)O_(2)/PVDF复合膜(60%)的提升了17%。To further improve their energy storage density,adding high-dielectric-constant ceramic fillers into polymers has become a common method.In comparison with nanoparticle fillers,1D and 2D nanofillers can greatly suppress the propagation of breakdown path in composite,and thus play a key role in rising the breakdown field and energy storage density of composite materials.However,the energy storage density in the organic/inorganic composites is largely limited as a result of the incompatibility between the interfaces of constituents.Here,DOPA was coated on the surface of Ti_(0.87)O_(2) nanosheets,which was synthesized via liquid-phase exfoliation.DOPA@Ti_(0.87)O_(2) nanofillers were employed to fabricate flexible poly(vinylidene fluoride.)(PVDF)films.The experimental results show that the energy storage efficiency of the resulting composite film is about 70%,about 17% higher than that of composite film filled with Ti_(0.87)O_(2)(~60%).

关 键 词：储能 复合 二维材料 包覆 流延法 

分 类 号：TB322[一般工业技术—材料科学与工程]