界面法制备三维网状PPy-PEDOT共聚物膜及电容性能  

Preparation and capacitance properties of three-dimensional network PPy-PEDOT copolymer membranes by interface method

作　　者：李闽 刘敏[3] 刘康 LI Min;LIU Min;LIU Kang(Department of Mechatronics Engineering,Wuhan Business University,Wuhan 430056,China;School of Resource and Environmental Science,Wuhan University,Wuhan 430072,China;State Grid ZhejiangElectric Power Research Institute,Hangzhou 310014,China;Economic and Information Technology Bureau,Wuhan Economicand Technological Development Zone(WHDZ),Wuhan 430056,China)

机构地区：[1]武汉商学院机电工程与汽车服务学院,武汉430056 [2]武汉大学资源与环境科学学院,武汉430072 [3]国网浙江省电力公司电力科学研究院,杭州310014 [4]武汉经济技术开发区(汉南区)经信局,武汉430056

出　　处：《材料工程》2019年第9期123-131,共9页Journal of Materials Engineering

基　　金：湖北省自然科学基金项目(2018CFB139)

摘　　要：制备具有多电子传输与多孔有序的结构电极是电化学储能技术创新发展的两个重要策略。本工作采用一种界面电化学聚合新法合成聚吡咯-聚3,4-乙撑二氧噻吩(PPy-PEDOT)共聚物薄膜材料。采用FTIR,XPS,EDX,SEM与电化学充放电测试对PPy-PEDOT共聚物膜的化学组成、分布、微观形貌及电容性能进行表征与测试。结果表明:PPy-PEDOT共聚物膜由PPy与PEDOT按一定比例组成,且分布均匀;SEM测试表明共聚物膜具有正反两面各异的特殊形貌,且有机相一侧呈三维网状多孔层状结构。电化学充放电测试表明,PPy-PEDOT共聚物膜表现出优异的超级电容器电极材料的特性,具有较高的比电容,较快的充放电速率与较好的循环稳定性。PPy与PEDOT共聚后实现二者性能互补,提高了共聚物膜的导电性,电荷迁移速率及稳定性,同时三维网状多孔层状结构也有助于充放电过程中电子离子的迁移,使得共聚物膜的储能性能显著提高。Advances in multi-electron transfer materials and architectured electrodes are two important strategies for innovations in electrochemicalenergy storage. The attainment of both by interfacial electrodeposition of freestanding PPy-PEDOT copolymer films was reported. The composition of the copolymer was verified by FTIR and XPS spectra. The dispersion and microstructure of PPy and PEDOT were studied by EDX mapping and SEM. The capacitive performances of the copolymer films were studied by electrochemical measurements. The results show the copolymer film is composed of PPy and PEDOT with homogeneous distribution in a certain proportion.The SEM images show the film exhibits heterogeneous microstructure and has an open porous 3D network microstructure. Electrochemical characterization shows that the copolymer film is an excellent supercapacitor electrode material with high specific capacitance, good power capability and cycle performance. The multi-electron transfer nature of the copolymer, the copolymerization synergistic effects and the unique microstructure are responsible for the improved charge-discharge performances.

关 键 词：聚吡咯 PEDOT 共聚物 界面聚合 超级电容器 

分 类 号：TB332[一般工业技术—材料科学与工程]