Enhanced thermoelectric figure of merit at near room temperature in n-type binary silver telluride nanoparticles

Gautam, Amish Kumar; Khare, Neeraj

doi:10.1016/j.jmat.2022.10.003

Cited by 8 publications

(4 citation statements)

References 37 publications

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Section: Resultsmentioning

confidence: 99%

“…The peaks of the surface potential for PANI, the PANI/WS 2 nanocomposite, and the PANI/WS 2 /CNT nanocomposite are obtained at 22.2, 33.6, and 35.2 mV, respectively. The work function of the samples can be obtained by utilizing these surface potential values using46 Tip is the work function of the AFM tip and ϕ sample is the work function of the sample. The work function of the conducting tip was calibrated using highly oriented pyrolytic graphite, which has a work function of 4.6 eV.…”

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Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application

Singh,

Gautam,

Faraz

et al. 2023

ACS Appl. Energy Mater.

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Conducting polymers are promising for near-room-temperature, wearable thermoelectric applications due to their flexibility, inherently low thermal conductivities, and tunable electrical conductivities. This work reports the fabrication of a flexible nanocomposite thick film consisting of conducting polymer, polyaniline (PANI), WS 2 nanosheets, and carbon nanotubes (CNTs) and investigates its thermoelectric properties. The incorporation of WS 2 nanosheets results in an ∼3 times enhancement in the Seebeck coefficient because of the high Seebeck coefficient of WS 2 nanosheets and the energy filtering effect at the PANI− WS 2 interface. The incorporation of CNTs acts as a conducting filler in the PANI/WS 2 matrix, which helps in improving the mobility of charge carriers and enhances the electrical conductivity. Hence, the simultaneous incorporation of WS 2 nanosheets and CNTs synergistically increases the Seebeck coefficient and the electrical conductivity in the nanocomposite thick films, which results in an ∼13 times enhancement in the power factor and an ∼10 times enhancement in the figure of merit (zT) at room temperature in comparison to pristine PANI film. The study suggests that the simultaneous incorporation of WS 2 nanosheets and CNTs in PANI is a promising strategy to improve the thermoelectric properties of PANI-based materials.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application

Singh,

Gautam,

Faraz

et al. 2023

ACS Appl. Energy Mater.

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“…Ag 2 Te nanoparticles were prepared via a one-pot hydrothermal route using tellurium powder (Te, 99.997%) and silver nitrate (AgNO 3 , ≥99.5%) as the initial precursor . The schematic of the synthesis process of Ag 2 Te nanoparticles is shown in the part of Figure .…”

Section: Methodsmentioning

confidence: 99%

“…Ag 2 Te nanoparticles were prepared via a one-pot hydrothermal route using tellurium powder (Te, 99.997%) and silver nitrate (AgNO 3 , ≥99.5%) as the initial precursor. 30 The schematic of the synthesis process of Ag 2 Te nanoparticles is shown in the part of Figure 1. In a typical synthesis process, a solution consisting of 0.2 mol Te powder and 0.6 mol NaBH 4 was mixed in 20 mL of deionized (DI) water in a beaker (50 mL), and the mixture was stirred for 30 min at 60 °C.…”

Section: Methodsmentioning

confidence: 99%

High Performance of n-Type Silver Telluride Nanoparticle-Embedded Nylon Membrane Composite Flexible Films for Thermoelectric Generators

Gautam,

Khare

2023

ACS Appl. Energy Mater.

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Due to the rapid advancement of flexible electronics, flexible thermoelectric materials that capture waste thermal energy have attracted much interest in recent years. In this study, we presented the preparation of a flexible Ag2Te-nylon composite film using the vacuum filtration method, which exhibited a high Seebeck coefficient (−135.5 μV/K) and simultaneous lower thermal conductivity (0.29 W/m K), resulting in an enhanced power factor of about 450 μW/m K2 and a figure of merit (zT) of about 0.48 at 313 K. The developed composite film demonstrates good flexibility in the bending test by retaining about 87% of the electrical conductivity even after 500 times bending. A single strip of the Ag2Te-nylon film can generate a maximum power density (PDmax) of ∼466 μW/cm2 at a ΔT of ∼36.8 K. The obtained thermoelectric performance of the present flexible film is higher in comparison to that of previously reported Ag2Te-based flexible thermoelectric generators. This shows great potential for the current method of fabrication of a flexible thermoelectric film for converting low-grade heat into useful electrical energy.

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Thermoelectric properties of Zn-doped In0.95Ga0.05Sb crystals grown by directional solidification

et al. 2023

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Enhanced thermoelectric figure of merit at near room temperature in n-type binary silver telluride nanoparticles

Cited by 8 publications

References 37 publications

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application

High Performance of n-Type Silver Telluride Nanoparticle-Embedded Nylon Membrane Composite Flexible Films for Thermoelectric Generators

Thermoelectric properties of Zn-doped In0.95Ga0.05Sb crystals grown by directional solidification

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Enhanced thermoelectric figure of merit at near room temperature in n-type binary silver telluride nanoparticles

Cited by 8 publications

References 37 publications

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS2/CNTs for Efficient Thermoelectric Application

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS2/CNTs for Efficient Thermoelectric Application

High Performance of n-Type Silver Telluride Nanoparticle-Embedded Nylon Membrane Composite Flexible Films for Thermoelectric Generators

Thermoelectric properties of Zn-doped In0.95Ga0.05Sb crystals grown by directional solidification

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Product

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Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application

Flexible, Freestanding Ternary Nanocomposite Thick Film of Polyaniline/WS₂/CNTs for Efficient Thermoelectric Application