1. Reduced graphene oxide/MWCNT hybrid sandwiched film by self-assembly for high performance supercapacitor electrodes.
- Author
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Li, Yong-Feng, Liu, Yan-Zhen, Yang, Yong-Gang, Wang, Mao-Zhang, and Wen, Yue-Fang
- Subjects
MULTIWALLED carbon nanotubes ,GRAPHENE ,ELECTRIC properties of thin films ,MOLECULAR self-assembly ,SUPERCAPACITORS ,ELECTRODES ,VACUUM ,LAYER structure (Solids) - Abstract
A reduced graphene oxide/multiwalled carbon nanotube (RGO/MWCNT) hybrid sandwiched film with different MWCNTs content was prepared by vacuum-assisted self-assembly from a complex dispersion of graphene oxide (GO) and MWCNTs followed by heat-treating at 200 °C for 1 h in a vacuum oven to reduce the GO into RGO. The free-standing RGO/MWCNT hybrid sandwiched film before heat-treatment showed a layered structure with an entangled network of MWCNTs sandwiched between the GO sheets. This unique structure not merely contribute to remove the oxygen-containing groups in GO during the heat-treatment, but also decrease the defects for electron transfer between RGO layers, which enhances the electrochemical capacitive performances of graphene-based films. A specific capacitance up to 379 F/g was achieved based on RGO/MWCNT with 30 % MWCNTs mass fraction at 0.1 A/g in a 6 M KOH electrolyte. The excellent performance of RGO/MWCNT hybrid sandwiched film signifies the importance of controlling the surface chemistry and sandwiched nanostructure of graphene-based materials. [ABSTRACT FROM AUTHOR]
- Published
- 2012
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