Journal
ACTA MATERIALIA
Volume 57, Issue 17, Pages 5131-5136Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2009.07.012
Keywords
Sol-gel; Raman spectroscopy; Electrical resistivity/conductivity; Nanocomposite; Porous material
Funding
- US Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- DOE Office of Energy Efficiency and Renewable Energy
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Here, we present the synthesis and characterization of low-density single-walled carbon nanotube-based aerogels (SWNT-CA). Aerogels with varying nanotube loading (0-55 wt.%) and density (20-350 mg cm(-3)) were fabricated and characterized by four-probe method, electron microscopy, Raman spectroscopy and nitrogen porosimetry. Several properties of the SANT-CAs were highly dependent upon nanotube loading. At nanotube loadings of 55 wt.%, shrinkage of the aerogel monoliths during carbonization and drying was almost completely eliminated. Electrical conductivities are improved by an order of magnitude for the SWNT-CA (55 wt.% nanotubes) compared to those of foams without nanotubes. Surface areas as high as 184 m(2) g(-1) were achieved for SWNT-CAs with greater than 20 wt.% nanotube loading. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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