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dc.contributor.authorLi, Chuanchangen_US
dc.contributor.authorXie, Baoshanen_US
dc.contributor.authorChen, Deliangen_US
dc.contributor.authorChen, Jianen_US
dc.contributor.authorLi, Weien_US
dc.contributor.authorChen, Zhongshengen_US
dc.contributor.authorGibb, Stuart W.en_US
dc.contributor.authorLong, Yien_US
dc.identifier.citationLi, C., Xie, B., Chen, D., Chen, J., Li, W., Chen, Z., Gibb, S. W. & Long, Y. (2019). Ultrathin graphite sheets stabilized stearic acid as a composite phase change material for thermal energy storage. Energy, 166, 246-255.
dc.description.abstractUltrathin graphite sheets (UGSs) were stripped directly from natural flake graphite (FG) through a coupled ultrasonication-milling (CUM) process followed by a shear-assisted supercritical CO2 (SSC) stripping. As-prepared UGSs were centrifuged (3500 and 5000 rpm) to support stearic acid (SA) to produce SA/UGSs. Characterization results proved UGSs was stripped from natural FG. Structural and morphological characterization demonstrated that the UGS-5000 had a layer thickness was about 3.4–4.2 nm, significantly thinner than that of natural FG. Raman spectra and TG-DSC analysis showed UGS-5000 have more structural defects than other UGSs, and could accommodate a SA loading capability of 171.5%. FTIR and XRD analysis indicated that no chemical reaction had occurred between SA and UGSs during impregnation. All samples had a good thermal stability below 180 °C, with the endothermic phase change peak being recorded between 53.60 and 53.12 °C range, and the melting and freezing enthalpies of SA/UGS-5000 were 113.7 and 112.9 J g−1, respectively. After 50 thermal cycles, it could keep a great thermal reliability and has a thermal conductivity of 10.08 times higher than that of pure SA. These results demonstrate that SA/UGS-5000 have potential in thermal energy storage applications including cooling, building energy efficiency and solar thermal storage.en_US
dc.rights© 2018 Elsevier Ltd. All rights reserved.en_US
dc.titleUltrathin graphite sheets stabilized stearic acid as a composite phase change material for thermal energy storageen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsUltrathin Graphite Sheetsen_US
dc.subject.keywordsStearic Aciden_US
dc.description.acknowledgementThis work was supported by the National Natural Science Foundation of China (51504041, 51874047, 51574205); the Changsha City Fund for Distinguished and Innovative Young Scholars; the Natural Science Foundation of Hunan Province (2016JJ3009); the Scientific Research Fund of Hunan Provincial Education Department (15K007); the Key Research and Development Program of Jiangxi Province (20171BBH80021); the State Key Laboratory Breeding Base of Nuclear Resources and Environment (NRE1403); the HOME Program of the Hunan Association for Science and Technology and the Hunan Province 2011 Collaborative Innovation Center of Clean Energy and Smart Grid.en_US
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