Mechanical and thermoelectric properties in Te-rich Ag2(Te,S) meta-phases

Wang, Yumeng; Qiu, Pengfei; Yang, Shiqi; Gao, Zhiqiang; Chen, Lidong; Shi, Xun

doi:10.1016/j.jmat.2023.08.001

Cited by 12 publications

(4 citation statements)

References 35 publications

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“…Compared with the traditional brittle inorganic TE materials and flexible organic TE materials, the recently discovered ductile inorganic TE materials are particularly suitable for Y-shaped flexible film TE devices. 32–40 They possess metal-like ductility, showing the ability to undergo nonreversible deformations without fracture under external force. This feature is different from mechanical flexibility, which usually refers to the material's ability to be reversibly deformed.…”

Section: Resultsmentioning

confidence: 99%

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

Yuan,

Qiu,

Sun

et al. 2024

Energy Environ. Sci.

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Section: Resultsmentioning

confidence: 99%

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

Yuan,

Qiu,

Sun

et al. 2024

Energy Environ. Sci.

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“…Wang et al demonstrated that the incorporation of sulfur (S) into Ag 2 Te results in a transition from brittle to ductile behavior when the sulfur concentration reaches 10% of the total anion content. 44 0.97 at 623 K, maintaining good plasticity and stable performance even after large plastic deformation. 45 Tang et al observed that Ag 2 Te x S 1−x (0.35 ≤ x ≤ 0.65) exhibits three distinct phases during heat treatment: a low-temperature crystalline phase, an amorphous phase, and a high-temperature cubic phase, with a transition from the low-temperature crystalline to the cubic phase occurring upon heating.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, its thermoelectric properties still fall short of traditional materials like Bi 2 Te 3 or PbTe. , The Ag 2 Te x S 1– x series has recently attracted attention for its superior thermoelectric performance and high ductility. Wang et al demonstrated that the incorporation of sulfur (S) into Ag 2 Te results in a transition from brittle to ductile behavior when the sulfur concentration reaches 10% of the total anion content . Liang et al found that Ag 4.02 TeS reached a ZT of 0.97 at 623 K, maintaining good plasticity and stable performance even after large plastic deformation .…”

Section: Introductionmentioning

confidence: 99%

High Ductility and Excellent Thermoelectric Performance in Te-Stabilized Cubic Ag₂Te_xS_1–x Solid Solutions

Zhong,

Luo,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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The stabilization at low temperatures of the Ag 2 S cubic phase could afford the design of high-performance thermoelectric materials with excellent mechanical behavior, enabling them to withstand prolonged vibrations and thermal stress. In this work, we show that the Ag 2 Te x S 1−x solid solutions, with Te content within the optimal range 0.20 ≤ x ≤ 0.30, maintain a stable cubic phase across a wide temperature range from 300 to 773 K, thus avoiding the detrimental phase transition from monoclinic to cubic phase observed in Ag 2 S. Notably, the Ag 2 Te x S 1−x (0.20 ≤ x ≤ 0.30) samples showed no fractures during bending tests and displayed superior ductility at room temperature compared to Ag 2 S, which fractured at a strain of 6.6%. Specifically, the Ag 2 Te 0.20 S 0.80 sample demonstrated a bending average yield strength of 46.52 MPa at 673 K, significantly higher than that of Ag 2 S, whose bending average yield strength dropped from 80.15 MPa at 300 K to 12.66 MPa at 673 K. Furthermore, the thermoelectric performance of the Ag 2 Te x S 1−x (0.20 ≤ x ≤ 0.30) samples surpassed that of both InSe and pure Ag 2 S, with the Ag 2 Te 0.30 S 0.70 sample achieving the highest ZT value of 0.59 at 723 K. These results indicate substantial potential for practical applications due to enhanced durability and thermoelectric performance.

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“…Flexible thermoelectric (TE) technology can generate useful electricity to power wearable electronics by using the small temperature difference between human body and environment, which is one of the most potential and promising self-supply power c) Comparison of normalized maximum power density (P max L/A, where P max is the maximum P at each ΔT, L and A are the length and cross-sectional area of the TE legs, respectively) among the reported flexible in-plane TE devices. [6,7,14,15,19,[46][47][48][49] the Ag 2 S-based [6,[22][23][24][25][26][27] and AgCuSe-based materials. [3,28] At room temperature, their maximum PF and zT are ≈5 μW cm −1 K −2 and 0.4-0.5, respectively.…”

Section: Introductionmentioning

confidence: 99%

High Thermoelectric Power Factors in Plastic/Ductile Bulk SnSe₂‐Based Crystals

Deng,

Gao,

Qiu

et al. 2023

Advanced Materials

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The recently discovered plastic/ductile inorganic thermoelectric (TE) materials open a new avenue for the fabrication of high‐efficiently flexible TE devices, which can utilize the small temperature difference between human body and environment to generate electricity. However, the maximum power factor (PF) of current plastic/ductile TE materials is usually around or less than 10 µW cm−1 K−2, much lower than the classic brittle TE materials. In this work, a record‐high PF of 18.0 µW cm−1 K−2 at 375 K in plastic/ductile bulk SnSe2‐based crystals is reported, superior to all the plastic inorganic TE materials and flexible organic TE materials reported before. The origin of such high PF is from the modulation of material's stacking forms and polymorph crystal structures via simultaneously doping Cl/Br at Se‐site and intercalating Cu inside the van der Waals gap, leading to the significantly enhanced carrier concentrations and mobilities. An in‐plane fully flexible TE device made of the plastic/ductile SnSe2‐based crystals is successfully developed to show a record‐high normalized maximum power density to 0.18 W m−1 under a temperature difference of 30 K. This work indicates that the plastic/ductile material can realize high TE power factor to achieve large output electric power density in flexible TE technology.

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Mechanical and thermoelectric properties in Te-rich Ag2(Te,S) meta-phases

Cited by 12 publications

References 35 publications

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

High Ductility and Excellent Thermoelectric Performance in Te-Stabilized Cubic Ag₂Te_xS_1–x Solid Solutions

High Thermoelectric Power Factors in Plastic/Ductile Bulk SnSe₂‐Based Crystals

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Mechanical and thermoelectric properties in Te-rich Ag2(Te,S) meta-phases

Cited by 12 publications

References 35 publications

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

Extraordinary self-powered Y-shaped flexible film thermoelectric device for wearables

High Ductility and Excellent Thermoelectric Performance in Te-Stabilized Cubic Ag2TexS1–x Solid Solutions

High Thermoelectric Power Factors in Plastic/Ductile Bulk SnSe2‐Based Crystals

Contact Info

Product

Resources

About

High Ductility and Excellent Thermoelectric Performance in Te-Stabilized Cubic Ag₂Te_xS_1–x Solid Solutions

High Thermoelectric Power Factors in Plastic/Ductile Bulk SnSe₂‐Based Crystals