Ultrahigh power factor and flexible silver selenide-based composite film for thermoelectric devices

Yao Lu1; Yang Qiu2; Kefeng Cai1; Yufei Ding1; Mengdi Wang3; Cong Jiang1; Qin Yao3; Changjun Huang1; Lidong Chen3; He JQ(何佳清)2

2019-07-01

10.1039/c9ee01609k

Energy & Environmental Science   影响因子和分区

1754-5692

1754-5706

Herein, an n-type Ag2Se/Ag/CuAgSe thermoelectric (TE) composite film supported by a porous nylon membrane with a record power factor (2231.5 mu W m(-1) K-2 at 300 K) is obtained via a simple approach. The ultrahigh power factor mainly originates from the optimized carrier transport of the composite material and the interfacial energy filtration effect. HAADF-STEM observations of a focused ion beam (FIB) prepared sample reveal that the Ag and CuAgSe in the composite exist as nanoparticles and most of the Ag nanoparticles and CuAgSe nanoparticles are randomly distributed at the surfaces and grain boundaries of the Ag2Se grains. Bending tests demonstrate superior flexibility of the hybrid film and the power factor decreases by only 10% after bending for 1000 cycles along a rod with a radius of 4 mm. The excellent flexibility is attributed to a synergetic effect of the nanocomposite film with numerous submicron-sized pores and the flexible nylon membrane. A flexible TE module is assembled using the optimum hybrid film, which generates an outstanding power density of 5.42 W m(-2) at a temperature difference of 45 K. This work not only demonstrates the tremendous potential of inorganic TE materials for flexible application, but also provides an effective strategy to design high-performance TE composites.

SCI ; EI

英语

ESI高被引

通讯

Science and Technology Innovation Committee Foundation of Shenzhen[KQTD2016022619565991] ; Science and Technology Innovation Committee Foundation of Shenzhen[ZDSYS20141118160434515]

Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology

Chemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences

WOS:000528728700008

ROYAL SOC CHEMISTRY

20201808594330

Silver compounds ; Silver nanoparticles ; Ion beams ; Bending tests ; Polyamides ; Hybrid materials ; Nanocomposite films ; Grain boundaries ; Copper compounds ; Rayon

Strength of Building Materials; Test Equipment and Methods:422 ; Semiconducting Materials:712.1 ; Nanotechnology:761 ; Organic Polymers:815.1.1 ; Synthetic Fibers:819.2 ; High Energy Physics:932.1

Web of Science

1.Tongji University
2.Southern University of Science and Technology
3.Shanghai Institute of Ceramics, Chinese Academy of Science
4.University of Chinese Academy of Sciences

Yao Lu,Yang Qiu,Kefeng Cai,et al. Ultrahigh power factor and flexible silver selenide-based composite film for thermoelectric devices[J]. Energy & Environmental Science,2019,13(4):1240-1249.

Yao Lu.,Yang Qiu.,Kefeng Cai.,Yufei Ding.,Mengdi Wang.,...&He JQ.(2019).Ultrahigh power factor and flexible silver selenide-based composite film for thermoelectric devices.Energy & Environmental Science,13(4),1240-1249.

Yao Lu,et al."Ultrahigh power factor and flexible silver selenide-based composite film for thermoelectric devices".Energy & Environmental Science 13.4(2019):1240-1249.