期刊
ADVANCED ENERGY MATERIALS
卷 2, 期 4, 页码 438-444出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201100697
关键词
energy density; reduced graphite oxide; single wall carbon nanotubes; supercapacitors; synergistic effects
类别
资金
- ONR/DMEA [H94003-10-2-1003]
- National Science Foundation [DMR-0958796]
A high energy density supercapacitor device is reported that utilizes hybrid carbon electrodes and the ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF4) as an electrolyte. The hybrid electrodes are prepared from reduced graphite oxide (rGO) and purified single-walled carbon nanotubes (SWCNTs). A simple casting technique gives the hybrid structure with optimum porosity and functionality that provides high energy and power densities. The combination of SWCNTs and rGO in a weight ratio of 1:1 is found to afford a specific capacitance of 222 F g-1 and an energy density of 94 Wh kg-1 at room temperature.
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