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Updated: Jul 12, 2025

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

Published on: August 30, 2024

伪多聚态相工程用于提高铜硫化物中的热电性能.

Tian-Yu Yang¹, Shi-Wei Gu¹, Yi-Xin Zhang¹

¹Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.

Advanced materials (Deerfield Beach, Fla.)

|October 30, 2023

概括

在硫化铜 (Cu_2-xS) 中的伪多态工程提高了热电性能. 使用CuBr的兴奋剂₂创造了特定的伪多态相,在能源应用中显著提高了ZT值.

关键词:

(伪) 多态相位工程的 (伪) 多态相位工程.原子分辨率扫描传输电子显微镜电子显微镜硫化铜硫化物是一种硫化铜.热电材料是一种热电材料.

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Last Updated: Jul 12, 2025

Demonstrating the Simplicity and In Situ Temperature Monitoring of the Mechanochemical Synthesis of Metal Chalcogenides Suitable for Thermoelectrics

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Published on: August 30, 2024

Author Spotlight: Advancing Energy Solutions Using Nanocomposites as Processed Thermoelectric Materials

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科学领域:

固态化学和材料科学固态化学和材料科学
晶体学和矿物学研究
能源转化材料是能源转化材料.

背景情况:

多态性和伪多态性在固体中很常见,影响材料特性.
控制这些现象是具有挑战性的,但对于高级应用来说至关重要.
热电材料,如硫化铜 (Cu_2-xS) 对于能量转换至关重要.

研究的目的:

应用伪多重形相 (PP) 概念来增强Cu_2-xS.S.的热电特性.
调查CuBr₂兴奋剂对Cu_2-xS.晶体结构和热电性能的影响.
探索PP工程在改善热电材料方面的潜力.

主要方法:

CuBr₂对Cu_2-xS进行注,以诱导伪多重形相变.
在高温下测量热电功率图 (ZT).
原子分辨率扫描传输电子显微镜 (STEM) 用于分析晶体结构和接口.

主要成果:

在Cu_1.8S中,在773K时达到1.25的峰值ZT值,与3重%的CuBr_2合.
该ZT值是原始Cu1.8S的2.3倍.
STEM证实了转换为PP工程的高二原体相,以及形成增强声子散射的接口.

结论:

伪多重形相 (PP) 工程是一种有效的策略,用于提高硫化铜化合物的热电性能.
形成特定的PP及其接口显著增强了声子散射,热电效率的一个关键因素.
这种方法有望优化其他热电材料和能量转换技术.