Preparation and characterization of manganese oxide/CNT composites as supercapacitive materials

被引：138

作者：

Fan, Zhen ^{[1
]}

Chen, Jinhua ^{[1
]}

Wang, Mingyong ^{[1
]}

Cui, Kunzai ^{[1
]}

Zhou, Haihui ^{[1
]}

Kuang, Wei ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chem Biosensing & Chemometr, Changsha 410082, Peoples R China

来源：

基金：

高等学校博士学科点专项科研基金;

关键词：

manganese oxide; carbon nanotubes; composites; supercapacitor;

D O I：

10.1016/j.diamond.2005.11.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Manganese oxide was synthesized and dispersed on carbon nanotube (CNT) matrix by thermally decomposing manganese nitrates. CNTs used in this paper were grown directly on graphite disk by chemical vapor deposition technique. The capacitive behavior of manganese oxide/CNT composites was investigated by cyclic voltammetry and galvanostatic charge-discharge method in I M Na2SO4 aqueous solutions. When the loading mass of MnO2 is 36.9 mu g cm(-2), the specific capacitance of manganese oxide/CNT composite (based on MnO2) at the charge-discharge current density of 1 mA cm(-2) equals 568 F g(-1). Additionally, excellent charge-discharge cycle stability (ca. 88% value of specific capacitance remained after 2500 charge-discharge cycles) and power characteristics of the manganese oxide/CNT composite electrode can be observed. The effect of loading mass of MnO2 on specific capacitance of the electrode has also been investigated. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：1478 / 1483

页数：6

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