碳纳米管/聚苯胺复合电极的制备及其性能表征  

Preparation and performance characterization of carbonnanotubes/polyaniline composite electrodes

作　　者：刘奇超 曹杨[1] 张慧芳[1] 顾宁[2] 刘子萱 边月豪 刘泽民 孙友谊[1] LIU Qichao;CAO Yang;ZHANG Huifang;GU Ning;LIU Zixuan;BIAN Yuehao;LIU Zemin;SUN Youyi(School of Materials Science and Technology,North University of China,Taiyuan 030051,China;School of Energy and Power Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学材料科学与工程学院,太原030051 [2]中北大学能源与动力工程学院,太原030051

出　　处：《功能材料》2024年第1期1223-1228,共6页Journal of Functional Materials

基　　金：中央引导地方专项基金(YDZJSX2021A026);山西省成果转化项目(202104021301059);山西省科技创新团队专项基金(202204051001006)。

摘　　要：采用柔性碳布作为复合电极的集流体,将高导电性的碳纳米管(CNTs)通过静电植绒的方式嵌入聚偏氟乙烯(PVDF)粘结剂中,得到具有更大电化学活性表面积的复合结构。然后将所得的材料通过电化学沉积的方式将具有赝电容特性的聚苯胺(PANI)镀在CNTs表面,得到了具有碳纳米管/聚苯胺(CNTs/PANI)两种活性物质的二元复合电极。采用扫描电子显微镜(SEM)对电极材料的结构进行表征。并将其与含有硫酸的聚乙烯醇(PVA)水凝胶电解质组装成具有对称结构的柔性固态超级电容器(SSC),并利用电化学工作站对其电性能进行测试,结果表明:在1 mA/cm^(2)的电流下,具有517 mF/cm^(2)的比容量;经过2500次的循环后,具有79.8%的容量保持率,库伦效率超过97%。该研究表明静电植绒技术可以作为制备高性能电极材料的一种有效途径。In this paper,a flexible carbon cloth was used as the fluid collector of the composite electrode,and the high-conductivity carbon nanotubes(CNTs)were embedded into the polyvinylidiene fluoride(PVDF)binder by electrostatic flocking to obtain a composite structure with a larger electrochemically active surface area.Then,polyaniline(PANI)with pseudocapacitance characteristics was plated on the surface of CNTs by electrochemical deposition,and a binary composite electrode with carbon nanotubes/polyaniline(CNTs/PANI)was obtained.The structure of the electrode material was characterized by scanning electron microscopy(SEM).The flexible solid-state supercapacitor(SSC)with symmetrical structure was assembled with polyvinyl alcohol(PVA)hydrogel electrolyte containing sulfuric acid,and its electrical performance was tested by electrochemical workstation.The results show that the SSC has a specific capacity of 517 mF/cm^(2) at a current of 1 mA/cm^(2).After 2500 cycles,it has a capacity retention rate of 79.8% and a Coulomb efficiency of more than 97%.The study shows that electrostatic flocking technology can be used as an effective way to prepare high performance electrode materials.

关 键 词：碳纳米管 聚苯胺 静电植绒 电化学沉积 

分 类 号：TQ152[化学工程—电化学工业]