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Hybrid carbon thermal interface materials for thermoelectric generator devices

Title
Hybrid carbon thermal interface materials for thermoelectric generator devices
Authors
Chung, Seok-HwanKim, Jong TaeKim, Dong Hwan
DGIST Authors
Chung, Seok-Hwan; Kim, Jong Tae; Kim, Dong Hwan
Issue Date
2020-11
Citation
Scientific Reports, 10(1), 18854
Type
Article
Article Type
Article
Keywords
NANOTUBE ARRAYSGRAPHITE NANOPLATELETCONTACT PRESSUREFLASH METHODGRAPHENECONDUCTIVITYRESISTANCEFUNCTIONALIZATIONPERFORMANCETECHNOLOGY
ISSN
2045-2322
Abstract
Thermal interface materials (TIMs) are extensively used in electronic devices as efficient heat transfer materials. We fabricated all-carbon TIMs by hybridizing single-wall carbon nanotubes (SWCNTs) with graphite and demonstrated their performance by applying them to a thermoelectric generator (TEG) device. The hybrid carbon TIM exhibited maximum thermal conductivity when the SWCNT content was near 10 wt%. The TIM thermal contact resistance measured by a home-made calorimeter setup was 2.19 × 10−4m2K/W, which did not vary with temperature but decreased with applied pressure. Post-treatment of the TIM with a silane coupling agent further reduced the TIM thermal contact resistance by 30%. When the TIM was placed between a TEG device and a copper heat reservoir, the TEG output power increased with the temperature difference across the TEG and applied pressure. Moreover, the post-treatment of the TIM enhanced the output power of the TEG device by up to 18.5%. This work provides a simple and effective pathway towards a carbon-based TIM that can be applied to a high temperature TEG. © 2020, The Author(s).
URI
http://hdl.handle.net/20.500.11750/12535
DOI
10.1038/s41598-020-75976-9
Publisher
Nature Publishing Group
Related Researcher
Files:
Collection:
Division of Nanotechnology1. Journal Articles


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