期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 12, 页码 14340-14346出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c02194
关键词
silver selenide; thermoelectric; film; flexible; power generator
资金
- National Natural Science Foundation of China [51972234, 51632010]
- National Key R&D Project of China [2018YFE0111500]
- National Postdoctoral Program for Innovative Talents [BX20200160]
- Science and Technology Innovation Committee Foundation of Shenzhen [JCYJ20200109141205978]
- China Postdoctoral Science Foundation [2020M671892, 2020M682758]
A high power factor and excellent flexibility Ag/Ag2Se composite film was fabricated on a flexible nylon membrane using wet chemical synthesis and vacuum-assisted filtration techniques. The optimized composite film showed high power factor and electrical conductivity at room temperature, and retained conductivity after repeated bending cycles. This work provides a new strategy for synthesizing flexible thermoelectric films with high power factor and electrical conductivity.
Herein, we fabricated an Ag/Ag2Se composite film on a flexible nylon membrane with a high power factor and excellent flexibility. First, Ag nanoparticles and multiscale Ag2Se nanostructure composite powders were prepared by wet chemical synthesis using Se nanowires, silver nitrate, and L-ascorbic acid as raw materials, followed by vacuum-assisted filtration of the composite powders on a porous nylon membrane and then hot pressing. The optimized composite film shows a very high power factor of 1860.6 mu Wm(-1) K-2 (with a corresponding electrical conductivity of 3958 S cm(-1)) at room temperature. The composite film retains 93.3% of the original electrical conductivity after 1000 bending cycles around a rod with a diameter of 8 mm. At a temperature difference of 27 K, an 8-leg thermoelectric prototype device assembled with the optimized composite film generates a maximum power of 7.14 mu W with a corresponding power density of 8.74 W m(-2). This work provides a new strategy to synthesize flexible thermoelectric films with both a high power factor and high electrical conductivity.
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