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Graphene-based 3D composite hydrogel by anchoring Co3O4 nanoparticles with enhanced electrochemical properties.
- Source :
- Physical Chemistry Chemical Physics (PCCP); 2013, Vol. 15 Issue 31, p12940-12945, 6p
- Publication Year :
- 2013
-
Abstract
- Three-dimensional (3D) graphene-based composite materials have attracted increasing attention, owing to their specific surface area, high conductivity and electronic interactions. Here, we report a convenient route to fabricate a 3D Co<subscript>3</subscript>O<subscript>4</subscript>/Graphene Hydrogel (CGH) composite as an electrode material for supercapacitors. Utilizing the gelation of a graphene oxide dispersion enables the anchoring of Co<subscript>3</subscript>O<subscript>4</subscript> nanoparticles on the graphene sheet surfaces and formation of the hydrogel simultaneously. Remarkably, the spherical Co<subscript>3</subscript>O<subscript>4</subscript> particles can serve as spacers to keep the neighboring graphene sheets separated. The CGH exhibits a high specific capacitance (C<subscript>s</subscript>) of 757.5 F g<superscript>−1</superscript> at a current density of 0.5 A g<superscript>−1</superscript>, indicating its potential application as an electrode material for supercapacitors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639076
- Volume :
- 15
- Issue :
- 31
- Database :
- Complementary Index
- Journal :
- Physical Chemistry Chemical Physics (PCCP)
- Publication Type :
- Academic Journal
- Accession number :
- 100923592
- Full Text :
- https://doi.org/10.1039/c3cp51710a