在 (Ag,S) 合金Cu2Te热电材料中大大优化了热电性能
Yi Niu1, Peng Luo1, Hailong Sun1
1Clean Energy Materials and Engineering Center, School of Integrated Circuit Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
ACS applied materials & interfaces
|September 12, 2025
概括
这项研究通过合银和硫来增强铜化物 (Cu2Te) 热电材料. 优化的材料获得了1.4的优点 (ZT),比原始Cu2Te.Te有460%的改进.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 能源转换 能源转换
背景情况:
- 铜化物 (Cu2Te) 化合物显示出热电应用的潜力.
- 然而,他们报告的优点数字 (ZT) 落后于Cu2S和Cu2Se等相关材料.
- 这一性能差距归因于低于最佳的热电传输特性.
研究的目的:
- 为了优化基于Cu2Te的材料的热电性能.
- 研究用银 (Ag) 和硫 (S) 合金对热电性能的影响.
- 为了在实际的热电应用中获得更高的优点 (ZT).
主要方法:
- 用Ag和S.对Cu2Te进行两步合金.
- 系统地研究热电传输特性,包括功率系数和热导率.
- 分析载体度,西贝克系数和变化.
主要成果:
- 在室温和773 K之间,实现了7.21 μW cm-1 K-2的增强平均功率系数.
- 总导热率在室温下降至0.55 W m-1 K-1 ,在523 K时达到0.49 W m-1 K-1的最低值.
- 在773K的 (Ag,S) 合金Cu2Te.中,获得了1.4的最大优点 (ZT) 值.
结论:
- 合Cu2Te与Ag和S有效地优化了电气和热传输特性.
- 优化的Ag0.7Cu1.3Te0.92S0.08组成表明,与原始Cu2Te.08相比,ZT显著增加了460%.
- 这些发现凸显了合金Cu2Te在先进的热电能转换方面的潜力.
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