Menzel, R, Barg, S, Miranda, M et al. (7 more authors) (2015) Joule Heating Characteristics of Emulsion-Templated Graphene Aerogels. Advanced Functional Materials, 25 (1). pp. 28-35. ISSN 1616-301X
Abstract
The Joule heating properties of an ultralight nanocarbon aerogel are investigated with a view to potential applications as energy-effi cient, local gas heater, and other systems. Thermally reduced graphene oxide (rGO) aerogels (10 mg cm −3 ) with defi ned shape are produced via emulsion-templating. Relevant material properties, including thermal conductivity, electrical conductivity and porosity, are assessed. Repeatable Joule heating up to 200 °C at comparatively low volt-ages (≈1 V) and electrical power inputs (≈2.5 W cm −3 ) is demonstrated. The steady-state core and surface temperatures are measured, analyzed and com-pared to analogous two-dimensional nanocarbon fi lm heaters. The assessment of temperature uniformity suggests that heat losses are dominated by conduc-tive and convective heat dissipation at the temperature range studied. The radial temperature gradient of an uninsulated, Joule-heated sample is analyzed to estimate the aerogel's thermal conductivity (around 0.4 W m −1 K −1 ). Fast initial Joule heating kinetics and cooling rates (up to 10 K s −1 ) are exploited for rapid and repeatable temperature cycling, important for potential applications as local gas heaters, in catalysis, and for regenerable of solid adsorbents. These princi-ples may be relevant to wide range of nanocarbon networks and applications.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2014, Wiley-VCH Verlag. This is the peer reviewed version of the following article: Menzel, R, Barg, S, Miranda, M, Anthony, DB, Bawaked, SM, Mokhtar, M, Al-Thabaiti, SA, Basahel, SN, Saiz, E and Shaffer, MSP (2015) Joule Heating Characteristics of Emulsion-Templated Graphene Aerogels. Advanced Functional Materials, 25 (1). pp. 28-35. ISSN 1616-301X, which has been published in final form at http://dx.doi.org/10.1002/adfm.201401807. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Keywords: | Carbon Nanotube Aerogels; Hybrid Aerogels; Surface-area; Film heaters; Oxide; Networks; Sponges; Supercapacitors; Architectures; Conductivity |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Aug 2016 09:28 |
Last Modified: | 18 Jan 2018 03:37 |
Published Version: | http://dx.doi.org/10.1002/adfm.201401807 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/adfm.201401807 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:99483 |