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Nanomaterials
Volume 12
Issue 23
10.3390/nano12234238
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Article

High Power Factor of Ag2Se/Ag/Nylon Composite Films for Wearable Thermoelectric Devices

by
Wenhang Wu
1,
Zheng Liang
2,
Meng Jia
1,
Yuwei Li
1,
Xiongcong Guan
1,
Yunfeng Zhan
1,
Jinxiu Wen
1,* and
Jianyi Luo
1,*
1
Research Center of Flexible Sensing Materials and Devices, School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, China
2
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2022, 12(23), 4238; https://doi.org/10.3390/nano12234238
Submission received: 26 September 2022 / Revised: 9 November 2022 / Accepted: 23 November 2022 / Published: 28 November 2022
(This article belongs to the Special Issue Advanced Nanomaterials in Flexible and Stretchable Electronic/Optoelectronic Devices)
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Abstract

A flexible thermoelectric device has been considered as a competitive candidate for powering wearable electronics. Here, we fabricated an n-type Ag2Se/Ag composite film on a flexible nylon substrate using vacuum-assisted filtration and a combination of cold and hot pressing. By optimising the Ag/Se ratio and the sequential addition and reaction time of AA, an excellent power factor of 2277.3 μW∙m−1 K−2 (corresponding to a ZT of ~0.71) at room temperature was achieved. In addition, the Ag2Se/Ag composite film exhibits remarkable flexibility, with only 4% loss and 10% loss in electrical conductivity after being bent around a rod of 4 mm radius for 1000 cycles and 2000 cycles, respectively. A seven-leg flexible thermoelectric device assembled with the optimised film demonstrates a voltage of 19 mV and a maximum power output of 3.48 μW (corresponding power density of 35.5 W m−2) at a temperature difference of 30 K. This study provides a potential path to design improved flexible TE devices.
Keywords: thermoelectricity; Ag2Se; Ag; composite film; flexible device thermoelectricity; Ag2Se; Ag; composite film; flexible device

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MDPI and ACS Style

Wu, W.; Liang, Z.; Jia, M.; Li, Y.; Guan, X.; Zhan, Y.; Wen, J.; Luo, J. High Power Factor of Ag2Se/Ag/Nylon Composite Films for Wearable Thermoelectric Devices. Nanomaterials 2022, 12, 4238. https://doi.org/10.3390/nano12234238

AMA Style

Wu W, Liang Z, Jia M, Li Y, Guan X, Zhan Y, Wen J, Luo J. High Power Factor of Ag2Se/Ag/Nylon Composite Films for Wearable Thermoelectric Devices. Nanomaterials. 2022; 12(23):4238. https://doi.org/10.3390/nano12234238

Chicago/Turabian Style

Wu, Wenhang, Zheng Liang, Meng Jia, Yuwei Li, Xiongcong Guan, Yunfeng Zhan, Jinxiu Wen, and Jianyi Luo. 2022. "High Power Factor of Ag2Se/Ag/Nylon Composite Films for Wearable Thermoelectric Devices" Nanomaterials 12, no. 23: 4238. https://doi.org/10.3390/nano12234238

APA Style

Wu, W., Liang, Z., Jia, M., Li, Y., Guan, X., Zhan, Y., Wen, J., & Luo, J. (2022). High Power Factor of Ag2Se/Ag/Nylon Composite Films for Wearable Thermoelectric Devices. Nanomaterials, 12(23), 4238. https://doi.org/10.3390/nano12234238

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