Synthesis and electrochemical performance of polyaniline-MnO2 nanowire composites for supercapacitors

被引：71

作者：

Chen, Ling ^{[1
,2
]}

Song, Zhaoxia ^{[1
,3
]}

Liu, Guichang ^{[2
]}

Qiu, Jieshan ^{[3
]}

Yu, Chang ^{[3
]}

Qin, Jiwei ^{[2
]}

Ma, Lin ^{[2
]}

Tian, Fengqin ^{[2
]}

Liu, Wei ^{[2
]}

机构：

[1] Dalian Nationalities Univ, Dept Chem Engn, Coll Life Sci, Dalian 116600, Peoples R China

[2] Dalian Univ Technol, Sch Chem Engn, Dalian 116024, Peoples R China

[3] Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, Dalian 116024, Peoples R China

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2013年 / 74卷 / 02期

关键词：

Oxides; Polymers; Chemical synthesis; Electrochemical properties; MANGANESE-DIOXIDE; HYDROTHERMAL SYNTHESIS; CHARGE STORAGE; NANOCOMPOSITE; ALPHA-MNO2; ELECTRODEPOSITION; NANOSTRUCTURES; STABILITY; MECHANISM; ENERGY;

D O I：

10.1016/j.jpcs.2012.10.013

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

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.

引用

页码：360 / 365

页数：6

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