Evaluation of Processing Parameters in the Solvothermal Synthesis of Cu-Rich Tetrahedrites for Potential Application as Thermoelectric Materials DOI Creative Commons

Itzel J. Soní-Castro,

A.B. López-Oyama, E. Rodríguez

и другие.

Crystals, Год журнала: 2024, Номер 14(10), С. 888 - 888

Опубликована: Окт. 12, 2024

The major issue associated with thermoelectric performance is the low efficiency of power conversion. main challenge achieving a combination high Seebeck coefficient, electrical conductivity, and thermal conductivity for significantly improved figure merit (ZT). Developing strategies include production tetrahedrites an intrinsically through solvothermal method, using reaction time processing temperature. Here, we report on preparation Cu-rich technique at temperature, providing promising strategy materials potential applications in thermoelectricity. influence synthesis temperature morphological, structural, thermoelectrical properties samples was investigated different characterization techniques. Tetrahedrite synthesized 180 °C 19 h yielded favorable ZT value >0.43 0.2 Wm−1 K−1 (423 K), related to Sb3+/Sb5+ Cu+/Cu2+ ratio, as observed by XPS. cubic tetrahedrite phase attributed (222) plane confirmed XRD TEM intense Raman mode 351 cm−1. SEM images revealed that nanotetrahedral efficiently assemble into spherical structures, resulting improvement coefficient (437 µVK−1) conductivity.

Язык: Английский

Modulated Electronic and Thermal Transport Properties in Cu-Based Diamond-like Chalcogenides by Point Defect Engineering DOI Creative Commons
Taras Parashchuk

The Journal of Physical Chemistry C, Год журнала: 2025, Номер 129(6), С. 3272 - 3284

Опубликована: Янв. 30, 2025

The electronic and thermal transport properties of thermoelectric materials are always affected by the presence native defects. However, importance these defects remains unclear due to complex nature their identification. In this study, we demonstrate that powder X-ray diffraction can provide necessary point defect scheme explain quaternary Cu-based diamond-like materials. particular, mixed cation occupancy Co, Ge, Cu in Cu2CoGeSe4 Sn Cu2CoSnSe4, as determined Rietveld refinement, have been successfully used elucidate influence on carrier concentration lattice conductivity. This approach allows for a quantitative prediction conductivity, which reaches very low value below 0.6 W m–1 K–1 at 773 K investigated selenides. Furthermore, substitutional were identified means improve properties, namely, modulating increasing power factor up 5–6 μW cm–1 K–2. improved conductivity observed selenides Cu2CoSnSe4 result significantly higher figure merit ZT than sulfides Cu2CoGeS4 Cu2CoSnS4. At K, undoped exhibit 0.75. addition identifying exceptional materials, research demonstrates effectiveness simple yet effective method investigating

Язык: Английский

Процитировано

2
Tailoring thermoelectric properties of ALD grown ZnO thin films: Effect of Al/Mg doping and post-annealing treatment DOI
U. Rehman, Kashaf Ul Sahar, Oleksandr Cherniushok

и другие.

Materials Chemistry and Physics, Год журнала: 2025, Номер 333, С. 130344 - 130344

Опубликована: Янв. 15, 2025

Язык: Английский

Процитировано

0
Tetrahedrite Nanocomposites for High Performance Thermoelectrics DOI Creative Commons
Rodrigo Coelho, Duarte Moço, A.I. de Sá

и другие.

Nanomaterials, Год журнала: 2025, Номер 15(5), С. 351 - 351

Опубликована: Фев. 24, 2025

Thermoelectric (TE) materials offer a promising solution to reduce green gas emissions, decrease energy consumption, and improve management due their ability directly convert heat into electricity vice versa. Despite potential, integrating new TE bulk devices remains challenge. To change this paradigm, the preparation of highly efficient tetrahedrite nanocomposites is proposed. Tetrahedrites were first prepared by solid state reaction, followed addition MoS2 nanoparticles (NPs) hot-pressing at 848 K with 56 MPa for duration 90 min obtain nanocomposites. The characterized XRD, SEM-EDS, Raman spectroscopy evaluate composites' matrix NP distribution. complement results, lattice thermal conductivity weighted mobility evaluated. NPs' tetrahedrites resulted in an increase 36% maximum figure merit (zT) comparatively base material. This explained reduction material's while maintaining its mobility. Such results highlight potential contribute development generation based on more affordable materials.

Язык: Английский

Процитировано

0
Discovery of a New Cu‐Based Chalcogenide with High zT Near Room Temperature: Low‐Cost Alternative for the Bi2Te3‐Based Thermoelectrics DOI Creative Commons
Oleksandr Cherniushok, Taras Parashchuk, G. Jeffrey Snyder

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 21, 2025

Copper-based chalcogenides are cost-effective and environmentally friendly thermoelectric (TE) materials for waste heat recovery. Despite demonstrating excellent performance, binary Cu2X (X = S, Se, Te) undergo superionic phase transitions above room temperature, leading to microstructural evolution unstable properties. In this work, a new γ-phase of Cu6Te3- xS1+ x (0 < ≤ 1) is discovered, narrow-bandgap semiconductor with outstanding performance high stability. By substituting Te S in metallic Cu6Te3S, the crystal symmetry modified structural eliminated. The exhibits significantly higher Seebeck coefficient up 200 µVK-1 compared 8.8 Cu6Te3S at temperature due optimized carrier concentration increased effective mass. also demonstrate ultralow thermal conductivity (≈0.25 Wm-1K-1), which, concert improved power factors, enables zT ≈1.1 relatively low 500 K. Unlike most Cu-based chalcogenides, transport property stability across multiple cycles, making it eco-friendly alternative Bi2Te3-based materials. developed promising candidate converters recovery, its potential can be further extended cooling applications through tuning.

Язык: Английский

Процитировано

0
Controlled Phonon Transport via Chemical Bond Stretching and Defect Engineering: The Case Study of Filled β-Mn-Type Phases DOI Creative Commons
Oleksandr Cherniushok, Taras Parashchuk, Raúl Cardoso‐Gil

и другие.

Inorganic Chemistry, Год журнала: 2024, Номер 63(39), С. 18030 - 18042

Опубликована: Сен. 13, 2024

Controlling the elastic properties of material could become a powerful tool for tuning thermal transport in solids. Nevertheless, impact crystal structure, chemical bonding, and on lattice conductivity remains to be elucidated. This is pivotal issue advancement thermoelectric (TE) materials. In this context, influence cation substitution tetrahedral voids structural, thermal, TE α- β-Pb

Язык: Английский

Процитировано

3
Engineering of copper sulfide-based nanomaterials for thermoelectric application DOI Creative Commons
Binqi He, Kai Zhang, Maiyong Zhu

и другие.

Green Energy & Environment, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 1, 2024

Язык: Английский

Процитировано

1
Evaluation of Processing Parameters in the Solvothermal Synthesis of Cu-Rich Tetrahedrites for Potential Application as Thermoelectric Materials DOI Creative Commons

Itzel J. Soní-Castro,

A.B. López-Oyama, E. Rodríguez

и другие.

Crystals, Год журнала: 2024, Номер 14(10), С. 888 - 888

Опубликована: Окт. 12, 2024

The major issue associated with thermoelectric performance is the low efficiency of power conversion. main challenge achieving a combination high Seebeck coefficient, electrical conductivity, and thermal conductivity for significantly improved figure merit (ZT). Developing strategies include production tetrahedrites an intrinsically through solvothermal method, using reaction time processing temperature. Here, we report on preparation Cu-rich technique at temperature, providing promising strategy materials potential applications in thermoelectricity. influence synthesis temperature morphological, structural, thermoelectrical properties samples was investigated different characterization techniques. Tetrahedrite synthesized 180 °C 19 h yielded favorable ZT value >0.43 0.2 Wm−1 K−1 (423 K), related to Sb3+/Sb5+ Cu+/Cu2+ ratio, as observed by XPS. cubic tetrahedrite phase attributed (222) plane confirmed XRD TEM intense Raman mode 351 cm−1. SEM images revealed that nanotetrahedral efficiently assemble into spherical structures, resulting improvement coefficient (437 µVK−1) conductivity.

Язык: Английский

Процитировано

0