Electrodepositions and capacitive properties of hybrid films of polyaniline and manganese dioxide with fibrous morphologies

被引：58

作者：

Sun, Li-Jie ^{[1
]}

Liu, Xiao-Xia ^{[1
]}

机构：

[1] Northeastern Univ, Dept Chem, Shenyang 110004, Peoples R China

来源：

EUROPEAN POLYMER JOURNAL | 2008年 / 44卷 / 01期

基金：

中国国家自然科学基金;

关键词：

polyaniline; manganese dioxide; electrodeposition; capacitive property; morphology;

D O I：

10.1016/j.eurpolymj.2007.10.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Electrocodepositions were conducted in solutions of aniline and MnSO4 through potential cycling to afford hybrid films of polyaniline (PANI) and manganese dioxide (PANI/MnO2). The films obtained displayed characteristic redox peaks of PANI on cyclic voltammograms in acidic aqueous solution. While in 1.0 M NaNO3 at pH 1, the films showed pseudocapacitive behaviors from 0 to 0.65 V vs. SCE. MnO2 was detected through XRD and XPS measurements oil the films. The codeposition of PANI with MnO2 had dramatic effects oil morphologies of the obtained hybrid films that displayed fibrous morphologies instead of granular one of PANI. Hybrid film PM50 obtained in the presence of 50 mM Mn2+ displayed a specific capacitance of 532 F g(-1) at 2.4 mA cm(-2) discharging current, 26% higher than that of similarly prepared PANI. It showed a coulombic efficiency (eta) of 97.5% over 1200 cycles with 76% specific capacitance maintained. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：219 / 224

页数：6

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