Synthesis of Birnessite-Type MnO2 by the In-Situ Electrochemical Oxidation of Mn3O4 Film for Supercapacitors
发布时间：2019-03-09
点击次数：
- 论文类型：
- 期刊论文
- 发表时间：
- 2012-05-01
- 发表刊物：
- NANOSCIENCE AND NANOTECHNOLOGY LETTERS
- 收录刊物：
- Scopus、EI、SCIE
- 文献类型：
- J
- 卷号：
- 4
- 期号：
- 5,SI
- 页面范围：
- 559-563
- ISSN号：
- 1941-4900
- 关键字：
- Manganese Oxide; Electrochemical Oxidation; Supercapacitor
- 摘要：
- 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.
- 第一作者
- Xia, Hui
- 合写作者
- Zhang, Jianwei,Li, Xiaogan
- 通讯作者
- Xia, H (reprint author), Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China.