Indexed by:
期刊论文
First Author:
Xia, Hui
Correspondence Author:
Xia, H (reprint author), Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China.
Co-author:
Zhang, Jianwei,Li, Xiaogan
Date of Publication:
2012-05-01
Journal:
NANOSCIENCE AND NANOTECHNOLOGY LETTERS
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
4
Issue:
5,SI
Page Number:
559-563
ISSN No.:
1941-4900
Key Words:
Manganese Oxide; Electrochemical Oxidation; Supercapacitor
Abstract:
Here we report an in situ electrochemical oxidation method to synthesize birnessite-type MnO2 electrodes for supercapacitors from cathodically deposited Mn3O4 thin films. Mn3O4 thin films composed of nanowall arrays with a porous structure were prepared by cathodic deposition at various temperatures. Nanoparticles were formed within the nanowalls when the deposition temperature is above 50 degrees C, building a nanoparticle/porous hierarchy architecture. Cyclic voltammogram (CV) was used to perform electrochemical oxidation on the Mn3O4 thin film. The birnessite-type MnO2 phase was successfully achieved after the electrochemical CV cyclings, which is believed to be responsible for the significant increase in the specific capacitance of the supercapacitor.
Translation or Not:
no
