High performance Ag2Se/Ag/PEDOT composite films for wearable thermoelectric power generators

Wang，Zixing1; Gao，Qi1; Wang，Wu2; Lu，Yao1,2; Cai，Kefeng1; Li，Yating1; Wu，Miaomiao1; He，Jiaqing2

2021-11-01

10.1016/j.mtphys.2021.100553

Materials Today Physics   影响因子和分区

2542-5293

Herein, we report a AgSe/Ag/PEDOT (poly (3,4-ethylenedioxythiophene) composite film with a high thermoelectric performance and superior flexibility. First, we used PEDOT: poly (styrenesulfonate) (PSS) coated Se nanowires (NWs) as templates to prepare PEDOT:PSS coated AgSe/Ag composite powders, then AgSe/Ag/PEDOT composite films supported on porous nylon membrane were fabricated by vacuum assisted filtration and then hot pressing. An optimum composite film exhibits a high power factor of ∼1442.5 μW m K, ultrahigh electrical conductivity (σ) of ∼5957.3 S cm and superior flexibility (only 5.5% decrease in σ after 1000 times bending around a 4 mm radius rod) at RT. A certain amount of Ag phase in the composite film leads to an ultrahigh σ, while the PEDOT located at the interface between Ag and AgSe grains and at the surface of the AgSe grains causes the composite film with a low thermal conductivity. The excellent flexibility is due to the synergistic effect of the nylon membrane and PEDOT. Moreover, a 4-leg flexible thermoelectric power generator (f-TEG) assembled with the composite film shows a low internal resistance of ∼8 Ω, which makes it very possible to be integrated with a DC/DC converter for continually outputting power. The f-TEG produces a voltage of 5.6 mV and a maximum power of 1.8 μW (power density of 7.47 W m) at a temperature gradient of 27 K. This work provides an effective avenue for preparing high-performance flexible thermoelectric film with ultrahigh electrical conductivity.

Ag2Se Film Flexible Thermoelectric

SCI ; EI

英语

通讯

National Key Research and Development Program of China[2018YFE0111500];Postdoctoral Research Foundation of China[2020M671892];Postdoctoral Research Foundation of China[2020M682758];National Natural Science Foundation of China[51632010];National Natural Science Foundation of China[51972234];National Postdoctoral Program for Innovative Talents[BX20200160];

WOS:000712036800001

20220311460929

Composite films ; Conducting polymers ; DC-DC converters ; Electric conductivity ; Electric power factor ; Hot pressing ; Polyamides ; Polymer films ; Selenium compounds ; Silver compounds ; Thermal conductivity ; Thermoelectric power ; Wearable technology

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electric Components:704.1 ; Conducting Materials:708.2 ; Polymeric Materials:815.1 ; Organic Polymers:815.1.1 ; Synthetic Fibers:819.2

2-s2.0-85122633573

Scopus

1.Key Laboratory of Advanced Civil Engineering Materials,Ministry of Education,Shanghai Key Laboratory of Development and Application for Metal-Functional Materials,School of Materials Science & Engineering,Tongji University,Shanghai,4800 Caoan Road,201804,China
2.Sustech Core Research Facilities and Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Wang，Zixing,Gao，Qi,Wang，Wu,et al. High performance Ag2Se/Ag/PEDOT composite films for wearable thermoelectric power generators[J]. Materials Today Physics,2021,21.

Wang，Zixing.,Gao，Qi.,Wang，Wu.,Lu，Yao.,Cai，Kefeng.,...&He，Jiaqing.(2021).High performance Ag2Se/Ag/PEDOT composite films for wearable thermoelectric power generators.Materials Today Physics,21.

Wang，Zixing,et al."High performance Ag2Se/Ag/PEDOT composite films for wearable thermoelectric power generators".Materials Today Physics 21(2021).