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A Bi 2 Te 3 -Filled Nickel Foam Film with Exceptional Flexibility and Thermoelectric Performance.
- Source :
- Nanomaterials (2079-4991); May2022, Vol. 12 Issue 10, p1693-1693, 13p
- Publication Year :
- 2022
-
Abstract
- The past decades have witnessed surging demand for wearable electronics, for which thermoelectrics (TEs) are considered a promising self-charging technology, as they are capable of converting skin heat into electricity directly. Bi<subscript>2</subscript>Te<subscript>3</subscript> is the most-used TE material at room temperature, due to a high zT of ~1. However, it is different to integrate Bi<subscript>2</subscript>Te<subscript>3</subscript> for wearable TEs owing to its intrinsic rigidity. Bi<subscript>2</subscript>Te<subscript>3</subscript> could be flexible when made thin enough, but this implies a small electrical and thermal load, thus severely restricting the power output. Herein, we developed a Bi<subscript>2</subscript>Te<subscript>3</subscript>/nickel foam (NiFoam) composite film through solvothermal deposition of Bi<subscript>2</subscript>Te<subscript>3</subscript> nanoplates into porous NiFoam. Due to the mesh structure and ductility of Ni Foam, the film, with a thickness of 160 μm, exhibited a high figure of merit for flexibility, 0.016, connoting higher output. Moreover, the film also revealed a high tensile strength of 12.7 ± 0.04 MPa and a maximum elongation rate of 28.8%. In addition, due to the film's high electrical conductivity and enhanced Seebeck coefficient, an outstanding power factor of 850 μW m<superscript>−1</superscript> K<superscript>−2</superscript> was achieved, which is among the highest ever reported. A module fabricated with five such n-type legs integrated electrically in series and thermally in parallel showed an output power of 22.8 nW at a temperature gap of 30 K. This work offered a cost-effective avenue for making highly flexible TE films for power supply of wearable electronics by intercalating TE nanoplates into porous and meshed-structure materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20794991
- Volume :
- 12
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Nanomaterials (2079-4991)
- Publication Type :
- Academic Journal
- Accession number :
- 157238447
- Full Text :
- https://doi.org/10.3390/nano12101693