用于高性能集成MgAgSb-MgCuSb系统的热电性能映射
Jiankang Li1,2, Airan Li1, Longquan Wang1
1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Japan.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|January 15, 2026
概括
这项研究优化了热电材料 (TEM) 和接口材料 (TEiM) 以实现高效的能量转换. 一个新的MgAgSb-MgCuSb系统在热电模块中实现了7.2%的峰值转换效率.
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:
- 热电 (TE) 模块的高转换效率需要优化热电材料 (TEM) 和热电接口材料 (TEiM).
- 热电导体需要高功率 (zT),由功率因数 (PF) 增加和热导率 (κ) 降低所驱动.
- 对于高效的能量传输,TEiM 需要高的电导率和热导率 (κ).
研究的目的:
- 开发高性能TEM和兼容TEiM的综合设计策略.
- 通过调整Ag/Cu比,探索MgAgSb-MgCuSb双相系统的热电特性映射.
- 用最优化的材料制造和评估热电模块.
主要方法:
- 构建了集成的MgAgSb-MgCuSb双相系统的热电性质映射.
- 调整了Ag/Cu比,以优化热电特性.
- 使用优化的p型MgAgSb和n型Mg3{\displaystyle Sb,Bi} 2.2,制造了一个双对热电模块.
主要成果:
- 富含的组合物 (例如,MgAg0.97Cu0.03Sb) 在TEM中显示出优异的PF (∼21μW cm−1 K−2) 和zT (1.12).
- 富含的成分 (MgAg0.05Cu0.95Sb) 被确定为最佳的TEiM,具有较低的接触电阻和优良的传输性能.
- 制造的热电模块实现了约7.2%的峰值转换效率.
结论:
- 通过综合设计实现了TEM和TEiM的协同优化.
- 开发的MgAgSb-MgCuSb系统显著提高了基于Mg的热电模块的性能.
- 这种方法为高效和可扩展的热电模块制造铺平了道路.
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