Actions for Synthesis and Characterization of Highly Crystalline Graphene Aerogels [electronic resource].

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Synthesis and Characterization of Highly Crystalline Graphene Aerogels [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2014.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 11,013-11,022 : digital, PDF file
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
Aerogels are used in a broad range of scientific and industrial applications due to their large surface areas, ultrafine pore sizes, and extremely low densities. Recently, a large number of reports have described graphene aerogels based on the reduction of graphene oxide (GO). Though these GO-based aerogels represent a considerable advance relative to traditional carbon aerogels, they remain significantly inferior to individual graphene sheets due to their poor crystallinity. Here, we report a straightforward method to synthesize highly crystalline GO-based graphene aerogels via high-temperature processing common in commercial graphite production. The crystallization of the graphene aerogels versus annealing temperature is characterized using Raman and X-ray absorption spectroscopy, X-ray diffraction, and electron microscopy. Nitrogen porosimetry shows that the highly crystalline graphene macrostructure maintains a high surface area and ultrafine pore size. Because of their enhanced crystallinity, these graphene aerogels exhibit a ~200 °C improvement in oxidation temperature and an order of magnitude increase in electrical conductivity.
Report Numbers
E 1.99:llnl-jrnl--660064
llnl-jrnl--660064
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Note
Published through SciTech Connect.
10/06/2014.
"llnl-jrnl--660064"
ACS Nano 8 10 ISSN 1936-0851 AM
Marcus A. Worsley; Thang T. Pham; Aiming Yan; Swanee J. Shin; Jonathan R. I. Lee; Michael Bagge-Hansen; William Mickelson; Alex Zettl.
Funding Information
AC52-07NA27344
AC02-05CH11231
View MARC record | catkey: 24090727