Boosting thermoelectric performance of single-walled carbon nanotubes-based films through rational triple treatments

Single-walled carbon nanotubes (SWCNTs)-based thermoelectric materials, valued for their flexibility, lightweight, and cost-effectiveness, show promise for wearable thermoelectric devices. However, their thermoelectric performance requires significant enhancement for practical applications. To achie...

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Veröffentlicht in:Nature communications 2024-04, Vol.15 (1), p.3426-3426, Article 3426
Hauptverfasser: Liu, Yuan-Meng, Shi, Xiao-Lei, Wu, Ting, Wu, Hao, Mao, Yuanqing, Cao, Tianyi, Wang, De-Zhuang, Liu, Wei-Di, Li, Meng, Liu, Qingfeng, Chen, Zhi-Gang
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Sprache:eng
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Zusammenfassung:Single-walled carbon nanotubes (SWCNTs)-based thermoelectric materials, valued for their flexibility, lightweight, and cost-effectiveness, show promise for wearable thermoelectric devices. However, their thermoelectric performance requires significant enhancement for practical applications. To achieve this goal, in this work, we introduce rational “triple treatments” to improve the overall performance of flexible SWCNT-based films, achieving a high power factor of 20.29 µW cm −1  K −2 at room temperature. Ultrasonic dispersion enhances the conductivity, NaBH 4 treatment reduces defects and enhances the Seebeck coefficient, and cold pressing significantly densifies the SWCNT films while preserving the high Seebeck coefficient. Also, bending tests confirm structural stability and exceptional flexibility, and a six-legged flexible device demonstrates a maximum power density of 2996 μW cm −2 at a 40 K temperature difference, showing great application potential. This advancement positions SWCNT films as promising flexible thermoelectric materials, providing insights into high-performance carbon-based thermoelectrics. Authors introduce triple treatments to advance flexible single-walled carbon nanotube films, achieving a power factor of 20.29 µW cm −1  K −2 . High structural stability and flexibility enable the fabrication of a high-power-density flexible device.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-47417-y