Recent progress in thermoelectric devices and applications

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159929 - 159929

Published: Jan. 1, 2025

Language: Английский

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Atomic to nanoscale chemical fluctuations: The catalyst for enhanced thermoelectric performance in high-entropy materials

Science Advances, Journal Year: 2025, Volume and Issue: 11(9)

Published: Feb. 28, 2025

High-entropy materials have expanded the frontier for discovering uncharted physicochemical properties. The phenomenon of chemical fluctuation is ubiquitous in high-entropy materials, yet its role thermoelectric field often overlooked. Herein, we designed and synthesized a series (Mg 0.94− n Yb 0.26 Sr Zn m )(Mg Cd 0.69 0.69− Na x )(Sb 1.74 Ca ) samples characterized by ultrahigh configurational entropy. These exhibit homogeneous single-phase structure at macroscopic microscopic scales, display notable fluctuations atomic to nanoscale. fluctuations, along with unusual occupations, lead an exceptionally low lattice thermal conductivity akin that amorphous materials. Combining optimized carrier concentration well-maintained mobility, ultimately achieved high zT value 1.2 750 kelvin, outperforming most previously reported AB 2 Sb -type Zintls. This study underscores nanoscale are crucial catalyst enhanced performance

Language: Английский

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Influence of Nanoparticle Seeds on the Formation and Growth of High Entropy Alloys during Core@Shell Nanoparticle Synthesis

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 26, 2025

The growth of inorganic shells on nanocrystal seeds to form core@shell nanoparticles is well-known enhance and improve properties performance, therefore foundational many applications. High entropy alloys, which contain five or more metals in near-equal amounts, are emerging as important materials due their synergistic properties. Integrating high alloys into the has potential combine expand benefits both. However, compositional complexity complicates shell because competing reactions byproducts that possible. Here, we report a synthetic protocol for growing alloy metal nanoparticle seeds, along with mechanistic insights from time-point studies define guidelines controlling composition, thickness, modes. By studying NiPdPtRhIr, SnPdPtRhIr, SnNiPdPtIr Au NiFePdRhIr both Pt find seed modifies reaction pathways accelerates formation compared when they synthesized directly absence seed. We also identify produce freestanding multimetallic particles instead desired shells, well evidence galvanic exchange ripening processes contribute growth. Based these insights, compiled roadmap design rules was then applied synthesis additional including SnNiFeRhIr SnNiFeCoPd, tolerance relative what can be achieved through direct synthesis.

Language: Английский

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Advanced High‒Entropy Materials for High‒Quality Energy Storage and Conversion

Energy storage materials, Journal Year: 2024, Volume and Issue: unknown, P. 103954 - 103954

Published: Dec. 1, 2024

Language: Английский

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High-entropy cathode materials for sodium-ion batteries: Correlating synthesis, crystal structure and electrochemical properties

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 98, P. 113078 - 113078

Published: July 29, 2024

Language: Английский

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Synthesis and thermoelectric properties of the high-entropy (Fe0.2Co0.2Cu0.2Zn0.2Mn0.2)Nb2O6 with columbite structure

Materials Letters, Journal Year: 2024, Volume and Issue: unknown, P. 137599 - 137599

Published: Oct. 1, 2024

Language: Английский

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Entropy stabilized Heusler alloys for Thermoelectric Applications

Solid State Sciences, Journal Year: 2024, Volume and Issue: 158, P. 107728 - 107728

Published: Oct. 22, 2024

Language: Английский

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