“Brick‐and‐Mortar” Self‐Assembly Approach to Graphitic Mesoporous Carbon Nanocomposites |
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Authors: | Pasquale F. Fulvio Richard T. Mayes Xiqing Wang Shannon M. Mahurin John C. Bauer Volker Presser John McDonough Yury Gogotsi Sheng Dai |
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Affiliation: | 1. Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;2. Department of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA;3. Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA |
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Abstract: | Mesoporous carbon materials do not have sufficient ordering at the atomic scale to exhibit good electronic conductivity. To date, mesoporous carbons having uniform mesopores and high surface areas have been prepared from partially‐graphitizable precursors in the presence of templates. High temperature thermal treatments above 2000 °C, which are usually required to increase conductivity, result in a partial or total collapse of the mesoporous structures and reduced surface areas induced by growth of graphitic domains, limiting their applications in electric double layer capacitors and lithium‐ion batteries. In this work, we successfully implemented a “brick‐and‐mortar” approach to obtain ordered graphitic mesoporous carbon nanocomposites with tunable mesopore sizes below 850 °C without using graphitization catalysts or high temperature thermal treatments. Phenolic resin‐based mesoporous carbons act as mortar to highly conductive carbon blacks and carbon onions (bricks). The capacitance and resistivity of final materials can be tailored by changing the mortar to brick ratios. |
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Keywords: | ordered mesoporous carbon carbon onions electrical resistivity nanocomposites |
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