Journal
CHEMPLUSCHEM
Volume 81, Issue 2, Pages 242-250Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201500338
Keywords
conducting materials; expanded graphite; nanohybrids; PEdot; supercapacitors
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Funding
- National Natural Science Foundation of China [21371053, 21401048, 21376065, 21201058]
- Cultivation Fund of Key Scientific and Technical Innovation Project
- Ministry of Education of China [708029]
- China Postdoctoral Science Foundation [2014M551285, 2015T80374]
- Postdoctoral Science Foundation of Heilongjiang Province [LBH-TZ0519]
- Natural Science Foundation of Heilongjiang Province [B201217]
- Institute of Basic Application Technology Research of Heilongjiang Province
- Innovative Research Project of Key Laboratory of Functional Inorganic Material Chemistry
- Ministry of Education
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Sulfamic acid (SFA)-doped poly(3,4-ethylenedioxythiophene) (PEdot) grown on expanded graphite (EG) nanohybrids (S-PEdot/EG) were synthesized by surfactant-free insitu chemical oxidative polymerization. The 3D hierarchical structure S-PEdot/EG with homogenous ridgelike surface morphology was achieved by intercalating 3,4-ethylenedioxythiophene monomers between the interlayers of EG using a vacuum-assisted method. The composition of the nanohybrids and the - interaction between the EG and PEdot molecules were characterized by using Raman spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The nanohybrid with an EG content of 10% exhibited excellent capacitive performance with a high capacitance of 139.6Fg(-1) at 1.0Ag(-1) in 1m LiClO4 electrolyte. In the two-electrode symmetric supercapacitors, the device performed with a high energy density of 6.83Whkg(-1) at the power density of 146Wkg(-1), and retained high stability during the charge-discharge process. The excellent performance can be attributed to the 3D hierarchical structure, the - interaction between EG and PEdot molecules, and the doped SFA as an immobilized counter-ion. This cost-effective and simple method used to fabricate 3D S-PEdot/EG nanohybrids is promising for the generation of electrode materials for high-performance supercapacitors.
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