期刊
APPLIED ENERGY
卷 153, 期 -, 页码 70-77出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2014.10.040
关键词
Polypyrrole; Smart electrode materials; Fluorescent nanospheres; Fluorescent brightener; Chemical oxidation polymerization
资金
- Natural Science Foundation of Gansu Province [1107RJZA213]
- Fundamental Research Funds for the Central Universities [lzujbky-2011-21, lzujbky-2013-237]
Fluorescent polypyrrole nanospheres (PPy/CBS-X) with uniform diameter were synthesized via a chemical oxidation polymerization with fluorescent brightener, 2,2'-([1,1'-biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonic acid disodium salt (CBS-X), as dopant. The sample S-2 containing 1 mol% CBS-X simultaneously exhibited the highest electrical conductivity of 31.3 S/cm and the largest specific area of 98.33 m(2)/g. When being used as electrode material for supercapacitors, it also possessed the high electrochemical specific capacitance (245.8 F/g) at a scan rate of 5 mV/s and the better rate capability and improved electrochemical stability than neutral (undoped) PPy, essentially attributed to a synergistic effect on the high doping level, large specific area and good pi-pi interactions from both PPy chains and CBS-X dopant. Most interestingly, the electrochemical activity of the fluorescent PPy/CBS-X could be easily monitored by photoluminescence. These features make the fluorescent polypyrrole nanospheres potential smart electrode material for high performance supercapacitors. (C) 2014 Elsevier Ltd. All rights reserved.
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