ELECTROCHEMICAL-HYDROTHERMAL SYNTHESIS OF MANGANESE OXIDE FILMS AS ELECTRODES FOR ELECTROCHEMICAL CAPACITORS

被引：20

作者：

Sarac, F. Eylul ^{[1
]}

Unal, Ugur ^{[1
,2
,3
]}

机构：

[1] Koc Univ, Grad Sch Sci & Engn, Istanbul, Turkey

[2] Koc Univ, Dept Chem, Istanbul, Turkey

[3] Koc Univ, Surface Sci & Technol Ctr KUYTAM, Istanbul, Turkey

来源：

ELECTROCHIMICA ACTA | 2015年 / 178卷

关键词：

hausmannite; hydrothermal-electrochemical method; pseudocapacitance; template-free synthesis; electrochemical oxidation; DIRECT FABRICATION; BIRNESSITE MNO2; GAMMA-MANGANESE; ENERGY-STORAGE; ZINC-OXIDE; THIN-FILM; TEMPERATURE; DEPOSITION; BEHAVIOR; DIOXIDE;

D O I：

10.1016/j.electacta.2015.07.169

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrochemical capacitors have attracted great interest because they can maintain high power density along with high energy density. In this study, manganese oxides were electrodeposited onto nickel mesh substrate under hydrothermal conditions to be used as electrodes for electrochemical capacitors. Obtained Mn3O4 (hausmannite) phase was electrochemically oxidized to mixed-valent MnO2 during potential cycling. MnO2 electrodes showed excellent pseudocapacitative behaviour in cyclic voltammetry (CV) and charge-discharge (CD) measurements. Produced electrodes had specific capacitance of 518.8 F g(-1) at 0.1 mA cm(-2). Also, the electrodes maintained their capacitative properties at high scan rates/current densities and after 10,000 cycles of CV measurement. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：199 / 208

页数：10

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