Control of anisotropic conduction of carbon nanotube sheets and their use as planar-type thermoelectric conversion materials
| Autor: | Tsuyohiko Fujigaya, Ryohei Yamaguchi, Takanobu Watanabe, Masamichi Matsumoto, Masakazu Mukaida, Motohiro Tomita, Takao Ishida, Keisuke Shima |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
102 Porous / Nanoporous / Nanostructured materials Carbon nanotubes anisotropy 02 engineering and technology Carbon nanotube 010402 general chemistry 01 natural sciences Energy Materials thermoelectric conversion law.invention Condensed Matter::Materials Science Thermal conductivity Electrical resistivity and conductivity law Thermoelectric effect Thermal 104 Carbon and related materials thermal conductivity sacrificial template wearable battery General Materials Science Composite material Anisotropy Materials of engineering and construction. Mechanics of materials 210 Thermoelectronics / Thermal transport / insulators electrical conductivity polymer particle 50 Energy Materials 021001 nanoscience & nanotechnology Thermal conduction 0104 chemical sciences Temperature gradient TA401-492 0210 nano-technology TP248.13-248.65 Biotechnology Research Article |
| Zdroj: | Science and Technology of Advanced Materials article-version (VoR) Version of Record Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 272-279 (2021) |
| ISSN: | 1878-5514 1468-6996 |
| DOI: | 10.1080/14686996.2021.1902243 |
| Popis: | The large anisotropic thermal conduction of a carbon nanotube (CNT) sheet that originates from the in-plane orientation of one-dimensional CNTs is disadvantageous for thermoelectric conversion using the Seebeck effect since the temperature gradient is difficult to maintain in the current flow direction. To control the orientation of the CNTs, polymer particles are introduced as orientation aligners upon sheet formation by vacuum filtration. The thermal conductivities in the in-plane direction decrease as the number of polymer particles in the sheet increases, while that in the through-plane direction increases. Consequently, a greater temperature gradient is observed for the anisotropy-controlled CNT sheet as compared to that detected for the CNT sheet without anisotropy control when a part of the sheet is heated, which results in a higher power density for the planar-type thermoelectric device. These findings are quite useful for the development of flexible and wearable thermoelectric batteries using CNT sheets. Graphical abstract |
| Databáze: | OpenAIRE |
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