Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres with ultralow thermal conductivity and high zT

Zhou, Tian; Wang, Lijun; Zheng, Shuqi; Hong, Min; Fang, Teng; Bai, Pengpeng; Chang, Siyi; Cui, Wenlin; Shi, Xiao‐Lei; Zhao, Huaizhou; Chen, Zhigang

doi:10.1016/j.nanoen.2018.04.035

Cited by 51 publications

(30 citation statements)

References 46 publications

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“…Li et al [ 23 ] obtained the values of c p via DSC analysis in the temperature range from 300 to 500 K, and the average value of c p was set to 0.33 J g −1 K −1 . Zhou et al [ 28 ] calculated the c p to be 0.318 J g −1 K −1 using the Dulong–Petit law. The thermal conductivity is a combination of the contributions from the lattice vibrations ( κ L : lattice thermal conductivity) and the charge carrier transport ( κ E : electronic thermal conductivity), which can be separated using the Wiedemann–Franz law ( κ E = LσT , L : Lorenz number).…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Lee

Kim

2021

Materials

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Permingeatite (Cu3SbSe4) is a promising thermoelectric material because it has a narrow band gap, large carrier effective mass, and abundant and nontoxic components. Mechanical alloying (MA), which is a high-energy ball mill process, has various advantages, e.g., segregation/evaporation is not required and homogeneous powders can be prepared in a short time. In this study, the effects of MA and hot-pressing (HP) conditions on the synthesis of the Cu3SbSe4 phase and its thermoelectric properties were evaluated. The electrical conductivity decreased with increasing HP temperature, while the Seebeck coefficient increased. The power factor (PF) was 0.38–0.50 mW m−1 K−2 and the thermal conductivity was 0.76–0.78 W m−1 K−1 at 623 K. The dimensionless figure of merit, ZT, increased with increasing temperature, and a reliable and maximum ZT value of 0.39 was obtained at 623 K for Cu3SbSe4 prepared using MA at 350 rpm for 12 h and HP at 573 K for 2 h.

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Section: Resultsmentioning

confidence: 99%

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Lee

Kim

2021

Materials

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“…This helps to avoid the overgrowth of the nanosheets. At the Ostwald ripening process, nanosheets then self‐assembled into irregular flower‐like architectures 29 . Finally, the porous hierarchical structure can be effectively obtained after calcination processes, mainly due to gas release resulting from the putrefaction of organic species, PVP 23,30 .…”

Section: Resultsmentioning

confidence: 99%

“…At the Ostwald ripening process, nanosheets then self-assembled into irregular flower-like architectures. 29 Finally, the porous hierarchical structure can be effectively obtained after calcination processes, mainly due to gas release resulting from the putrefaction of organic species, PVP. 23,30 At higher PVP concentrations (50 mg), the flower-like architecture cracks into fragments and forms petal-like nanosheets (at lower reaction time) and flake-like ZCO (at higher reaction time, 180 C/12 h), as shown in Scheme 1B.…”

Section: Fe-semmentioning

confidence: 99%

Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo ₂ O ₄ microstructures for energy storage devices

et al. 2020

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Hierarchical 3D flower-like ZnCo 2 O 4 (ZCO) microstructures assembled from petal-like nanosheets/flakes of non-uniform sizes were engineered by a polyvinylpyrrolidone (PVP)-assisted hydrothermal method. Four different samples/ morphologies of ZCO were obtained (PVP-L@6, PVP-H@6, PVP-L@12, and PVP-H@12) by altering the reaction parameters such as surfactant concentration (PVP) and reaction time, which can play a significant role in the formation of flower-/petal-/flake-like architectures. The alteration of the reaction parameters not only resulted in morphological changes but also affected the surface area, pore size/volume, crystalline nature, non-stoichiometry of Zn, Co, and O in ZCO, and their electrochemical performance. The metal (Zn/Co)/O deficiencies of ZCO samples were investigated via X-ray photoelectron spectroscopy and supported by the Rietveld refinement method. Furthermore, a plausible growth mechanism for these flower-like ZCO microstructures was projected based on the experimental results. The four dissimilar samples/morphologies of ZCO, which exhibit different electrochemical performances, were investigated. Our results show that PVP-H@12 exhibits higher specific capacitance (761/680 F g −1 at 0.35/1 A g −1) and good cycling constancy (90% capacitive retention after 2000 cycles at 5 Ag −1) among all the four samples.

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“…In this situation, further modification of the kinetic conditions is needed, and the appropriate selection of solvent is one of the solutions to achieve this goal. Figure 9f shows an SEM image of SnSe nanoplates synthesized by a typical hydrothermal route,260 in which the nanoplates have very small sizes, and are agglomerating to form a flower‐like morphology 320. Previous studies indicate that the flower‐like morphology prefers to form when the vapor pressure is lower than the standard value (such as the synthesis temperature does not reach the boiling temperature of solvent),89 and increasing the precursors amounts can achieve the similar results since there is no enough space for the crystal growth inside the autoclaves.…”

Section: Morphology Controlmentioning

confidence: 99%

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

2020

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Tin selenide (SnSe) is one of the most promising candidates to realize environmentally friendly, cost‐effective, and high‐performance thermoelectrics, derived from its outstanding electrical transport properties by appropriate bandgaps and intrinsic low lattice thermal conductivity from its anharmonic layered structure. Advanced aqueous synthesis possesses various unique advantages including convenient morphology control, exceptional high doping solubility, and distinctive vacancy engineering. Considering that there is an urgent demand for a comprehensive survey on the aqueous synthesis technique applied to thermoelectric SnSe, herein, a thorough overview of aqueous synthesis, characterization, and thermoelectric performance in SnSe is provided. New insights into the aqueous synthesis‐based strategies for improving the performance are provided, including vacancy synergy, crystallization design, solubility breakthrough, and local lattice imperfection engineering, and an attempt to build the inherent links between the aqueous synthesis‐induced structural characteristics and the excellent thermoelectric performance is presented. Furthermore, the significant advantages and potentials of an aqueous synthesis route for fabricating SnSe‐based 2D thermoelectric generators, including nanorods, nanobelts, and nanosheets, are also discussed. Finally, the controversy, strategy, and outlook toward future enhancement of SnSe‐based thermoelectric materials are also provided. This Review guides the design of thermoelectric SnSe with high performance and provides new perspectives as a reference for other thermoelectric systems.

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Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres with ultralow thermal conductivity and high zT

Cited by 51 publications

References 46 publications

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo ₂ O ₄ microstructures for energy storage devices

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

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Self-assembled 3D flower-like hierarchical Ti-doped Cu3SbSe4 microspheres with ultralow thermal conductivity and high zT

Cited by 51 publications

References 46 publications

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Thermoelectric and Transport Properties of Permingeatite Cu3SbSe4 Prepared Using Mechanical Alloying and Hot Pressing

Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo 2 O 4 microstructures for energy storage devices

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

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Effect of reaction time and PVP contents on morphologies of hierarchical 3D flower‐like ZnCo ₂ O ₄ microstructures for energy storage devices