Ideal capacitive behavior of hydrous manganese oxide prepared by anodic deposition

被引：569

作者：

Hu, CC ^{[1
]}

Tsou, TW ^{[1
]}

机构：

[1] Natl Chung Cheng Univ, Dept Chem Engn, Chiayi 621, Taiwan

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2002年 / 4卷 / 02期

关键词：

a-MnO2; nH(2)O; anodic deposition; pseudocapacitance; supercapacitor;

D O I：

10.1016/S1388-2481(01)00285-5

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Amorphous hydrous manganese oxide (a-MnO2.nH(2)O) was anodically deposited onto a graphite substrate from a MnSO4.5H(2)O solution with pH of 6.4. The specific capacitance of this thick a-MnO2.nH(2)O deposit, measured from both cyclic voltammetry and chronopotentiometry, is about 265-320 F g(-1) in a potential window of 1.0 V. The electrochemical reversibility of redox couples at/within the a-MnO2.nH(2)O was significantly influenced by the pH of the test electrolytes. This amorphous hydrous oxide exhibited ideal capacitive behavior (acceptable capacity, high reversibility and high pulse charge-discharge property) between 0 and 1.0 V in 0.1 M Na2SO4 indicating a promising electrode material for electrochemical supercapacitors. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：105 / 109

页数：5

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