Cathodic electrodeposition of Ag-doped manganese dioxide films for electrodes of electrochemical supercapacitors

被引：81
作者：
Wang, Yaohui [1 ]
Zhitomirsky, Igor [1 ]
机构：
[1] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L7, Canada
来源：
MATERIALS LETTERS | 2011年 / 65卷 / 12期
基金：
加拿大自然科学与工程研究理事会;
关键词：
Manganese dioxide; Silver; Film; Supercapacitor; Electrode; OXIDE THIN-FILMS; CAPACITOR; DEPOSITION; MNO2;
D O I：
10.1016/j.matlet.2011.03.074
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cathodic electrodeposition method has been developed for the fabrication of Ag-doped MnO(2) films from the KMnO(4) aqueous solutions containing AgNO(3) for the application in electrodes of electrochemical supercapacitors (ES). The films were characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), cyclic voltammetry (CV) and impedance spectroscopy. The Ag-doped MnO(2) films showed improved capacitive behaviour and lower electrical resistance compared to pure MnO(2) films. The highest specific capacitance (SC) of 770 F g(-1) was obtained at a scan rate of 2 mV s(-1) in the 0.5 M Na(2)SO(4) electrolyte. (C) 2011 Elsevier B.V. All rights reserved.
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页码：1759 / 1761
页数：3
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