TIF Progress Report – Functionalized Carbon Nanotubes as Novel Supercapacitor Electrode Materials - Second Annual Report

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Authors
  1. Adronov, A.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);McMaster Univ, Hamilton Ont (CAN) Dept of Chemistry
Abstract
Complexes between conjugated polymers and carbon nanotubes were prepared and investigated in terms of their physical, electronic, and structural characteristics. These complexes can lead to the formation of highly stable nanotube solutions in a variety of solvents. UV-Vis, Raman, and fluorescence spectroscopy were used to characterize the polymer-nanotube complexes and it was found that complexation of the nanotubes by the polymers leads to a red-shift in polymer absorption, and a complete quenching of polymer fluorescence. The high degree of solubility imparted by polymer complexation enables the preparation of homogeneous thin films of any thickness by vacuum filtration methods. These films are flexible and robust, and can be used in the preparation of supercapacitor electrodes. Of the different types of complexes investigated, ones that utilize conjugated polyelectrolytes are most effective in producing highly soluble nanotubes, and lead to the most conductive thin films. Some encouraging preliminary supercapacitance results have been obtained with complexes of carbon nanotubes and sulfonated polyaniline (SPA), where the ammonium salt of the polymer becomes self doped upon drying as a result of evolution of ammonia. This material is expected to exhibit the highest electrical conductivity of all the samples investigated. Supercapacitance results have indicated that SPAMWNT capacitance is in the range of 80 F/g, and SPA-SWNT capacitance approaches 140 F/g. Comparing these va

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Report Number
DRDC-ATLANTIC-CR-2008-231 — Contractor Report
Date of publication
01 May 2009
Number of Pages
46
DSTKIM No
CA033420
CANDIS No
532732
Format(s):
Electronic Document(PDF)

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