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High thermoelectric performance of flexible nanocomposite films based on Bi2Te3 nanoplates and carbon nanotubes selected using ultracentrifugation by Tomoyuki Chiba; Hayato Yabuki; Masayuki Takashiri is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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## Abstract Thermoelectric generators with flexibility and high performance near 300 K have the potential to be employed in self-supporting power supplies for Internet of Things (IoT) devices. Bismuth telluride (Bi~2~Te~3~) exhibits high thermoelectric performance, and single-walled carbon nanotubes (SWCNTs) show excellent flexibility. Therefore, composites of Bi~2~Te~3~ and SWCNTs should exhibit an optimal structure and high performance. In this study, flexible nanocomposite films based on Bi~2~Te~3~ nanoplates and SWCNTs were prepared by drop casting on a flexible sheet, followed by thermal annealing. Bi~2~Te~3~ nanoplates were synthesized using the solvothermal method, and SWCNTs were synthesized using the super-growth method. To improve the thermoelectric properties of the SWCNTs, ultracentrifugation with a surfactant was performed to selectively obtain suitable SWCNTs. This process selects thin and long SWCNTs but does not consider the crystallinity, chirality distribution, and diameters. A film consisting of Bi~2~Te~3~ nanoplates and the thin and long SWCNTs exhibited high electrical conductivity, which was six times higher than that of a film with SWCNTs obtained without ult

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Author

Tomoyuki Chiba; Hayato Yabuki; Masayuki Takashiri

Publisher

Springer Science and Business Media LLC

Published

2023

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)