Guo, S. R. and Wang, W. and Ozkan, C. S. and Ozkan, M.. (2013) Assembled graphene oxide and single-walled carbon nanotube ink for stable supercapacitors. Journal of Materials Research, 28 (7). pp. 918-926.
Full text not available from this repository.Abstract
We describe the synthesis and fabrication of a graphene oxide (GO) and single-walled carbon nanotube (SWCNT) composite ink (GO-SWCNT ink) for electrochemically stable supercapacitors. Atomic force microscopy and scanning electron microscopy studies demonstrate that the obtained GO flakes are single layer with size distribution from 100 nm to 20 mu m. SWCNTs are dispersed using a GO aqueous solution (2 mg/mL) with sonication support to achieve a SWCNT concentration of 12 mg/mL, the highest reported value so far without surfactant assistance. Raman spectroscopy studies indicate that the full-width at half-maximum of the G band increases with the mixing of SWCNT and GO indicating that electronic structure changes via pi-pi interactions of GO sheets and SWCNTs. Paper-based electrodes of supercapacitor were conveniently fabricated with GO-SWCNT composite ink via a dip casting method. By using different concentrations of SWCNT in the ink, the paper electrodes provide different capacitance values. The highest value of specific capacitance reaches 295 F/g at a current density of 0.5 A/g with a GO/SWCNT weight ratio of 1:5. The cycling stability for the GO-SWCNT paper electrode supercapacitors indicates capacitance retention of 85% over 60,000 cycles.
| Item Type: | Article |
|---|---|
| Additional Information: | ISI Document Delivery No.: 116XRTimes Cited: 0Cited Reference Count: 48Guo, Shirui Wang, Wei Ozkan, Cengiz S. Ozkan, MihrimahWinston Chung Global Energy Center at UCR, The Riverside Public Utilities; CMMI Division of the National Science Foundation 0800680; Materials Research Science and Engineering Center (NSF-MRSEC) on Polymers 0213695; Nanoscale Science and Engineering Center (NSF-NSEC) on hierarchical manufacturing (CHM) 0531171We gratefully acknowledge financial support for this work by the Winston Chung Global Energy Center at UCR, The Riverside Public Utilities, the CMMI Division of the National Science Foundation (Award No. 0800680), the Materials Research Science and Engineering Center (NSF-MRSEC) on Polymers (Award No. 0213695), and the Nanoscale Science and Engineering Center (NSF-NSEC) on hierarchical manufacturing (CHM, Award No. 0531171).Cambridge univ pressNew york |
| Uncontrolled Keywords: | arrays |
| Collections: | Nanomanufacturing Research Collection > Nanomanufacturing Nanoscale Science and Engineering Centers > Center for Hierarchical Manufacturing |
| Depositing User: | Robert Stevens |
| Date Deposited: | 27 Mar 2014 |
| Last Modified: | 27 Mar 2014 20:21 |
| URI: | http://eprints.internano.org/id/eprint/2165 |
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