Xiao, X orcid.org/0000-0003-0718-2591, Jia, H, Pervaiz, S orcid.org/0000-0002-6861-9374 et al. (1 more author) (2020) Molten Salt/Metal Foam/Graphene Nanoparticle Phase Change Composites for Thermal Energy Storage. ACS Applied Nano Materials, 3 (6). pp. 5240-5251. ISSN 2574-0970
Abstract
The binary and ternary mixtures of nitrates are desirable phase change materials (PCMs) as latent heat thermal energy storage media for solar energy applications. In this study, graphene oxide was synthesized with graphite powder first and then it was doped into HITEC salt or solar salt solvent with sonication using two-step methods. Finally, metal foams including nickel and copper ones were impregnated with the salt seeded with graphene (nanocomposite). The morphologies of the synthesized composite PCMs were analyzed extensively, while the thermophysical properties of the composite PCMs were both theoretically predicted and experimentally investigated. The results indicated that metal foam was compatible with nanocomposite and the thermal stabilities of the composite PCMs were good regarding the thermal cycle characteristics. The effective thermal conductivities of the salt/graphene/metal foam composites were distinctly enhanced, while the latent heats of the present composite PCMs were smaller than that of pure salt to some extent. Furthermore, the phase change temperatures shifted slightly in the presence of porous metal foam and graphene, while the addition of graphene could compensate for the reduction of specific heats of the composite PCMs caused by metal foam. Finally, it was found that the thermal effusivities of the salt/graphene/metal foam composites were larger than those of pure salt, indicating the increments of 110%∼270% in solid state and 150%∼360% in liquid state, respectively. Fundamental information on the nanocomposites with porous media could broaden their application in thermal energy storage systems.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 American Chemical Society. This is an author produced version of an article published in ACS Applied Nano Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | molten salt; graphene; metal foam; morphological characteristics; thermal characterization |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 18 Dec 2020 14:18 |
Last Modified: | 20 Jun 2021 08:38 |
Status: | Published |
Publisher: | American Chemical Society (ACS) |
Identification Number: | 10.1021/acsanm.0c00648 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:169164 |