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Surface enhanced Raman scattering studies on poly(3,4-ethylene dioxythiophene)/single-walled carbon nanotubes composites and their application to rechargeable lithium batteries

AuthorsBaibarac, M.; Gómez-Romero, P.
Issue Date2009
PublisherAmerican Scientific Publishers
CitationJournal of Nanoscience and Nanotechnology 9(10): 6204-6209 (2009)
AbstractIn this paper, surface enhanced Raman scattering (SERS) studies on the chemical polymerization of 3,4-ethylene dioxythiophene (EDOT) in the presence of single-walled carbon nanotubes (SWNTs) are reported. Both a non-covalent and covalent functionalization of SWNTs with poly(3,4-ethylene dioxythiophene) (PEDOT) is invoked as a result of the following variations induced in the SERS spectra of PEDOT and SWNTs: (i) the appearance of a Raman line at 140 cm -1 indicating the formation of a new covalent bond between PEDOT and SWNTs; (ii) an increase in the intensity of the Raman line at 705 cm -1, associated with the deformation vibration mode of C-S-C bond, the result of a steric hindrance effect induced by the bonding of PEDOT on SWNTs; and (iii) the enhancement of the Raman band with maximum at 1540 cm-1 (G- component) in SWNTs when the PEDOT weight in the PEDOT/SWNTs composite increases. Using the PEDOT/SWNTs composite as a positive electrode and an electrolytic solution containing LiPF6, the charge-discharge characteristics of the rechargeable lithium cells are determined. High specific discharge capacity are reported for the PEDOT/SWNTs composite (ca. 218 mAh g-1) in comparison with PEDOT doped with FeCI-4 ions (ca. 25 mAh g-1).
Identifiersdoi: 10.1166/jnn.2009.1548
issn: 1533-4880
e-issn: 1533-4899
Appears in Collections:(CIN2) Artículos
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