期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 15, 期 31, 页码 12940-12945出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51710a
关键词
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资金
- Jiangsu Funds for Distinguished Young Scientists [BK2012035]
- Program for New Century Excellent Talents in University [NCET-11-0834]
- Postdoctoral Foundation of China [20110491425]
- Jiangsu Planned Projects for Postdoctoral Research Funds [1101013C]
- Fundamental Research Funds for the Central Universities [30920130111004, 2012ZDJH002]
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 Co3O4/Graphene Hydrogel (CGH) composite as an electrode material for supercapacitors. Utilizing the gelation of a graphene oxide dispersion enables the anchoring of Co3O4 nanoparticles on the graphene sheet surfaces and formation of the hydrogel simultaneously. Remarkably, the spherical Co3O4 particles can serve as spacers to keep the neighboring graphene sheets separated. The CGH exhibits a high specific capacitance (C-s) of 757.5 F g(-1) at a current density of 0.5 A g(-1), indicating its potential application as an electrode material for supercapacitors.
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