Disorder‐Induced Extremely Low Thermal Conductivity of Graphite Fluoride
for a 178 nm-thick flake, resulting in an anisotropy ratio of thermal conductivity exceeding 100. The record-low through-plane thermal conductivity stems from widely distributed interlayer spacing with configurational and stacking disorders as well as mass and rotational disorders, while reduced in-plane thermal conductivity results from nm-sized fluorinated grains with configurational disorder. We further investigate the effect of fluorine incorporation on surfaces, revealing that surface fluorination minimally impacts interfacial thermal conductance. Our results demonstrate how structural disorder creates unprecedented lower bounds for thermal conductivity in layered materials modified by functional groups.
Authors
- Qiye Zheng (ORCID: https://orcid.org/0000-0002-1889-8846)
- Changheon Kim (ORCID: https://orcid.org/0000-0002-5451-0853)
- Yeojin Lee (ORCID: https://orcid.org/0000-0002-5548-5346)
- Richard B. Wilson (ORCID: https://orcid.org/0000-0002-8219-9679)
- Ziyan Qian
- Hyejin Jang (ORCID: https://orcid.org/0000-0002-5896-684X)
- Donghoon Moon
- Hyobin Yoo
- Wonsik Lee (ORCID: https://orcid.org/0009-0003-6641-4070)
- Gwan‐Hyoung Lee
- Jinwoo Kim
Institutions
- University of California, Riverside (US)
- Seoul National University (KR)
- Hong Kong University of Science and Technology (HK)
Publication Details
- Journal
- Advanced Science
- Published
- 2026-05-08
- DOI
- https://doi.org/10.1002/advs.202518438
- Primary Topic
- Thermal properties of materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Seoul National University
- Ministry of Science and ICT, South Korea
- Key Technologies Research and Development Program
- Institute of Engineering Research, Seoul National University
- Basic and Applied Basic Research Foundation of Guangdong Province