Design and synthesis of hierarchical MnO2 nanospheres/carbon nanotubes/conducting polymer ternary composite for high performance electrochemical electrodes.
Published
Journal Article
For efficient use of metal oxides, such as MnO(2) and RuO(2), in pseudocapacitors and other electrochemical applications, the poor conductivity of the metal oxide is a major problem. To tackle the problem, we have designed a ternary nanocomposite film composed of metal oxide (MnO(2)), carbon nanotube (CNT), and conducting polymer (CP). Each component in the MnO(2)/CNT/CP film provides unique and critical function to achieve optimized electrochemical properties. The electrochemical performance of the film is evaluated by cyclic voltammetry, and constant-current charge/discharge cycling techniques. Specific capacitance (SC) of the ternary composite electrode can reach 427 F/g. Even at high mass loading and high concentration of MnO(2) (60%), the film still showed SC value as high as 200 F/g. The electrode also exhibited excellent charge/discharge rate and good cycling stability, retaining over 99% of its initial charge after 1000 cycles. The results demonstrated that MnO(2) is effectively utilized with assistance of other components (fFWNTs and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) in the electrode. Such ternary composite is very promising for the next generation high performance electrochemical supercapacitors.
Full Text
Duke Authors
Cited Authors
- Hou, Y; Cheng, Y; Hobson, T; Liu, J
Published Date
- July 2010
Published In
Volume / Issue
- 10 / 7
Start / End Page
- 2727 - 2733
PubMed ID
- 20586479
Pubmed Central ID
- 20586479
Electronic International Standard Serial Number (EISSN)
- 1530-6992
International Standard Serial Number (ISSN)
- 1530-6992
Digital Object Identifier (DOI)
- 10.1021/nl101723g
Language
- eng