期刊
RSC ADVANCES
卷 8, 期 6, 页码 2851-2857出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra12108c
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资金
- Ministry of Science and Technology of Taiwan [MOST 105-2221-E-002-047-MY3, MOST 106-2221-E-002-193-MY2]
This study evaluates DC-pulse nitrogen atmospheric-pressure-plasma-jet processed carbon nanotube (CNT)-reduced graphene oxide (rGO) nanocomposites for gel-electrolyte supercapacitor applications. X-ray photoelectron spectroscopy (XPS) indicates decreased oxygen content (mainly, C-O bonding content) after nitrogen APPJ processing owing to the oxidation and vaporization of ethyl cellulose. Nitrogen APPJ processing introduces nitrogen doping and improves the hydrophilicity of the CNT-rGO nanocomposites. Raman analysis indicates that nitrogen APPJ processing introduces defects and/or surface functional groups on the nanocomposites. The processed CNT-rGO nanocomposites on carbon cloth are applied to the electrodes of H2SO4-polyvinyl alcohol (PVA) gel-electrolyte supercapacitors. The best achieved specific (areal) capacitance is 93.1 F g(-1) (9.1 mF cm(-2)) with 15 s APPJ-processed CNT-rGO nanocomposite electrodes, as evaluated by cyclic voltammetry under a potential scan rate of 2 mV s(-1). The addition of rGOs in CNTs in the nanoporous electrodes improves the supercapacitor performance.
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