Electrochemically induced deposition method to prepare γ-MnO2/multi-walled carbon nanotube composites as electrode material in supercapacitors

被引：32

作者：

Fan, Zhen ^{[1
]}

Chen, Jinhua ^{[1
]}

Zhang, Bing ^{[1
]}

Sun, Feng ^{[1
]}

Liu, Bo ^{[1
]}

Kuang, Yafei ^{[1
]}

机构：

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

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 8-9期

基金：

高等学校博士学科点专项科研基金;

关键词：

composites; electrochemical measurements; electrochemical properties;

D O I：

10.1016/j.materresbull.2007.09.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The gamma-MnO2/multi-walled carbon nanotube (gamma-MnO2/MWNT) composite has been prepared by electrochemically induced deposition method. The morphology and crystal structure of the composite were investigated by X-ray diffraction and scanning electron microscopy, respectively. The capacitive properties of the gamma-MnO2/MWNT composite have been investigated by cyclic voltammetry (CV). A specific capacitance (based on gamma-MnO2) as high as 579 F g(-1) is obtained at a scan rate of 10 mV s(-1) in 0.1 M Na2SO4 aqueous solution. Additionally, the gamma-MnO2/MWNT composite electrode shows excellent long-term cycle stability (only 2.4% decrease of the specific capacitance is observed after 500 CV cycles). (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2085 / 2091

页数：7

共 28 条

[1]

An KH, 2001, ADV FUNCT MATER, V11, P387, DOI 10.1002/1616-3028(200110)11:5<387::AID-ADFM387>3.0.CO

[2]

2-G

[3]

An KH, 2001, ADV MATER, V13, P497, DOI 10.1002/1521-4095(200104)13:7<497::AID-ADMA497>3.0.CO

[4]

2-H

[5] Ultracapacitors: why, how, and where is the technology [J].

Burke, A .

JOURNAL OF POWER SOURCES, 2000, 91 (01) :37-50

[6] Material characterization and electrochemical performance of hydrous manganese oxide electrodes for use in electrochemical pseudocapacitors [J].

Chang, JK ;

Tsai, WT .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2003, 150 (10) :A1333-A1338

[7]

Conway B. E., 1999, ELECTROCHEMICAL SUPE

[8]

Conway B. E., 1995, ELECTROCHEMICAL SOC

[9] TRANSITION FROM SUPERCAPACITOR TO BATTERY BEHAVIOR IN ELECTROCHEMICAL ENERGY-STORAGE [J].

CONWAY, BE .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1991, 138 (06) :1539-1548

[10] Preparation and characterization of manganese oxide/CNT composites as supercapacitive materials [J].

Fan, Zhen ;

Chen, Jinhua ;

Wang, Mingyong ;

Cui, Kunzai ;

Zhou, Haihui ;

Kuang, Wei .

← 1 2 3 →