Enhanced thermal conductivity in natural graphite-based multigraphene materials
We report natural graphite-based multigraphene materials with thermal conductivity enhanced by 20% compared to our previously reported results. The influence of density on the thermal conductivity of these materials was examined. Increasing the density from 1.0 to 1.8 g cm−3 leads to a more than twofold enhancement in thermal conductivity, surpassing the 600 W m−1 K−1 threshold. This result is attributed to a reduction in crystallite misorientation angles to below 15° and a two-order-of-magnitude decrease in defect density from 2 × 10−2 % to 4 × 10−4 %. A multiscale thermal conductivity model for such multigraphene materials was developed, calibrated, and assessed using experimental x-ray diffraction data and electrical conductivity measurements.
Authors
- Vladimir A. Shulyak (ORCID: https://orcid.org/0009-0000-5248-0286)
- K. K. Abgaryan (ORCID: https://orcid.org/0000-0002-0059-0712)
- Н. С. Морозов (ORCID: https://orcid.org/0009-0008-9621-1748)
- Kristina E. Klyukova (ORCID: https://orcid.org/0000-0003-2469-5129)
- Victor Vasil’evich Avdeev (ORCID: https://orcid.org/0000-0001-5573-2987)
- Sergei N. Chebotarev (ORCID: https://orcid.org/0000-0002-8700-4471)
- A. A. Zhuravlev (ORCID: https://orcid.org/0000-0002-5059-456X)
- Alexandra V. Gracheva (ORCID: https://orcid.org/0009-0003-3114-1893)
- V. Yu. Gubin
- M. G. Morozov (ORCID: https://orcid.org/0009-0007-1000-5883)
- I. K. Nigmatullin (ORCID: https://orcid.org/0009-0008-8494-5410)
- A. N. Silyutin (ORCID: https://orcid.org/0009-0008-0131-5887)
Institutions
- Lomonosov Moscow State University (RU)
- Moscow State University (TJ)
Publication Details
- Journal
- Applied Physics Letters
- Published
- 2026-08-17
- DOI
- https://doi.org/10.1063/5.0343403
- Primary Topic
- Thermal properties of materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00