-兴奋剂诱导的双相结构推进了状Ag2S基热电学
Hao Wu1, Xiao-Lei Shi2, Yuanqing Mao2
1State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 26, 2024
概括
这项研究引入了Sn-doping,以创建一个灵活的硫化银 (Ag2S) 热电材料. 新的双相结构提高了热电性能,同时保持了废热收集的优良可塑性.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 纳米技术纳米技术
背景情况:
- 硫化银 (Ag2S) 是一个有前途的柔性热电材料,由于其柔性.
- 目前用于提高Ag2S热电性能的方法通常会降低其灵活性.
- 有效的废热采集需要具有高热电性能和机械灵活性的材料.
研究的目的:
- 为Ag2S开发一种新的Sn-doping策略,同时改善热电特性并保持可塑性.
- 研究Sn-doping诱导的双相结构对电子和声子运输的影响.
- 根据优化材料制造和评估一个灵活的热电装置.
主要方法:
- 将Sn-doping纳入Ag2S0.7Se0.3中,以创建一个双相结构: (Ag,Sn) 2S0.7Se0.3和Ag2S0.7Se0.3.3.
- 描述双相材料的结构,电气和热传输特性.
- 制造一个四条腿的平面内柔性热电装置.
主要成果:
- 在343K时达到0.42的功率 (ZT) 值,性超过90%.
- 优化的功率因子达到5μWcm-2K-2在343K由于增强的载体度和移动性.
- 通过双相结构诱导的缺陷,通过0.18 W m-1 K-1 的压制晶格导热率.
- 制造的柔性装置在 ΔT = 30 K 时显示出最大功率密度为 ≈49 μW cm−2.
结论:
- 兴奋剂诱导的双相结构化是一种有效的策略,用于协同控制基于Ag2S的热电器中的电子和声子传输.
- 与现有的选项相比,开发的材料提供了热电性能和机械灵活性的优越组合.
- 这一进步为废热回收应用的高效灵活热电设备铺平了道路.
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