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Low thermal contact resistance boron nitride nanosheets composites enabled by interfacial arc-like phonon bridge.

Authors :
Zhan K
Chen Y
Xiong Z
Zhang Y
Ding S
Zhen F
Liu Z
Wei Q
Liu M
Sun B
Cheng HM
Qiu L
Source :
Nature communications [Nat Commun] 2024 Apr 04; Vol. 15 (1), pp. 2905. Date of Electronic Publication: 2024 Apr 04.
Publication Year :
2024

Abstract

Two-dimensional materials with ultrahigh in-plane thermal conductivity are ideal for heat spreader applications but cause significant thermal contact resistance in complex interfaces, limiting their use as thermal interface materials. In this study, we present an interfacial phonon bridge strategy to reduce the thermal contact resistance of boron nitride nanosheets-based composites. By using a low-molecular-weight polymer, we are able to manipulate the alignment of boron nitride nanosheets through sequential stacking and cutting, ultimately achieving flexible thin films with a layer of arc-like structure superimposed on perpendicularly aligned ones. Our results suggest that arc-like structure can act as a phonon bridge to lower the contact resistance by 70% through reducing phonon back-reflection and enhancing phonon coupling efficiency at the boundary. The resulting composites exhibit ultralow thermal contact resistance of 0.059 in <superscript>2</superscript> KW <superscript>-1</superscript> , demonstrating effective cooling of fast-charging batteries at a thickness 2-5 times thinner than commercial products.<br /> (© 2024. The Author(s).)

Details

Language :
English
ISSN :
2041-1723
Volume :
15
Issue :
1
Database :
MEDLINE
Journal :
Nature communications
Publication Type :
Academic Journal
Accession number :
38575613
Full Text :
https://doi.org/10.1038/s41467-024-47147-1