Synthesis and electrochemical performance of polyaniline-MnO2 nanowire composites for supercapacitors
Synthesis and electrochemical performance of polyaniline-MnO2 nanowire composites for supercapacitors
复制标题
超级电容器用聚苯胺-MnO2纳米线复合材料的合成及电化学性能
DOI：
10.1016/j.jpcs.2012.10.013
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发表时间：
2013-02-01
影响因子：
4
通讯作者：
Liu, Wei
中科院分区：
文献类型：
--
作者：
Chen, Ling;Song, Zhaoxia;Liu, Wei
采用原位化学氧化聚合法制备了聚苯胺-二氧化锰纳米线（PANI-MNW）复合材料。采用X射线衍射（XRD）和扫描电子显微镜（SEM）对复合材料的结构和形貌进行了表征。在1 mol/L KOH电解液中，采用循环伏安法、恒流充放电和交流阻抗法研究了它们的电化学性能。与未处理的MnO 2纳米线相比，PANI-MNW复合材料显示出显着更好的比容量和氧化还原性能。增强的性能可以主要归因于复合结构，其中高孔隙率之间的二氧化锰纳米线和聚苯胺在制造过程中的PANI-MNW纳米复合材料。在1 A/g的电流密度下，PANI-MNW-5的比电容高达256 F/g，且具有良好的循环性能和库仑效率。(C)2012爱思唯尔有限公司保留所有权利。
Polyaniline-MnO2 nanowire (PANI-MNW) composites were prepared by in situ chemical oxidative polymerization of aniline monomer in a suspension of MnO2 nanowires. The structure and morphology of the PANI-MNW composites were characterized by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). Their electrochemical properties were investigated using cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy in 1 mol/L KOH electrolyte. The PANI-MNW composites show significantly better specific capacity and redox performance in comparison to the untreated MnO2 nanowires. The enhanced properties can be mainly attributed to the composite structure wherein high porosity is created between MnO2 nanowires and PANI during the process of fabricating the PANI-MNW nanocomposites. A specific capacitance as high as 256 F/g is obtained at a current density of 1 A/g for PANI-MNW-5, and the composite also shows a good cyclic performance and coulomb efficiency. (C) 2012 Elsevier Ltd. All rights reserved.