Cited by 341Thermal properties of materialsPhase Change Materials ResearchCarbon Nanotubes in Composites

Continuous Carbon Nanotube–Ultrathin Graphite Hybrid Foams for Increased Thermal Conductivity and Suppressed Subcooling in Composite Phase Change Materials

Kholmanov, Iskandar, Kim, Jaehyun, Ou, Eric, Ruoff, Rodney S., Shi, Li·2015·ACS Nano

Abstract

Continuous ultrathin graphite foams (UGFs) have been actively researched recently to obtain composite materials with increased thermal conductivities. However, the large pore size of these graphitic foams has resulted in large thermal resistance values for heat conduction from inside the pore to the high thermal conductivity graphitic struts. Here, we demonstrate that the effective thermal conductivity of these UGF composites can be increased further by growing long CNT networks directly from the graphite struts of UGFs into the pore space. When erythritol, a phase change material for thermal energy storage, is used to fill the pores of UGF-CNT hybrids, the thermal conductivity of the UGF-CNT/erythritol composite was found to increase by as much as a factor of 1.8 compared to that of a UGF/erythritol composite, whereas breaking the UGF-CNT bonding in the hybrid composite resulted in a drop in the effective room-temperature thermal conductivity from about 4.1 ± 0.3 W m(-1) K(-1) to about 2.9 ± 0.2 W m(-1) K(-1) for the same UGF and CNT loadings of about 1.8 and 0.8 wt %, respectively. Moreover, we discovered that the hybrid structure strongly suppresses subcooling of erythritol due to the heterogeneous nucleation of erythritol at interfaces with the graphitic structures.

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Crossref · 10.1021/acsnano.5b02917

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43 of 43 references verified0 citation errors · 0 not checkable

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  • Although adequate additives can significantly improve thermal conductivity, thermal storage density is considerably reduced due to the occupation of additives inside original channels.

    “Conversely, although adequate additives can significantly improve the thermal conductivity, the thermal storage density is considerably reduced due to the occupation of additives inside original channels.”

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Research works printed but not linked: 1

  1. Bergman, T. L.; Lavine, A. S.; Incropera, F. P.; DeWitt, D. P.Fundamentals of Heat and Mass Transfer,7th ed.Wiley, 2011; p236.

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Authors
Kholmanov, I., Kim, J., Ou, E., Ruoff, R. S., & Shi, L.
Affiliations
  • Texas Materials Institute (US)
  • Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
  • Institute for Basic Science (KR)
Corresponding author
  • Kholmanov, Iskandar
  • Shi, Li
Venue
ACS Nano
Published
2015-11-09
Volume
9
Issue
12
Pages
11699-11707
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2210958799
Cited by
341
References
43
Citations by year
2026: 9 · 2025: 16 · 2024: 32 · 2023: 21 · 2022: 38 · 2021: 48 · 2020: 48 · 2019: 51 · 2018: 38 · 2017: 28 · 2016: 12
FWCI
10.55
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Nano (publishedVersion)
  • PubMed (publishedVersion)
  • INO Open Portal (submittedVersion)
  • Scholarworks@UNIST (Ulsan National Institute of Science and Technology) (submittedVersion)
Funders
  • Institute for Basic Science (IBS-R019-D1)
  • Advanced Research Projects Agency - Energy (DE-AR0000178)
  • Basic Energy Sciences (DE-FG02-07ER46377)
  • Office of Naval Research (N00014-14-1-0258)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Thermal properties of materials
  • Physical Sciences › Engineering › Mechanical Engineering › Phase Change Materials Research
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
Keywords
carbon nanotubes, hybrid composites, thermal conductivity, phase change materials, erythritol, thermal energy storage, heterogeneous nucleation, CNT networks

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