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Updated: Jan 25, 2026

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负热膨胀粒子使高性能和超耐用的热电模块成为可能
Hao Yang1, Pengfei Xu2, Bassem A Al-Maythalony3
1School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
Science advances
|January 23, 2026
概括
研究人员开发了一种使用负热膨胀粒子 (NTE) 的新方法,以提高热电器件的稳定性和性能. 这一策略提高了接口兼容性,并减少了热应力,从而提高了转换效率.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 热电学是一种热电学.
背景情况:
- 接口兼容性对于固态电池,柔性电子和燃料电池中的设备稳定性至关重要.
- 控制热膨胀系数 (CTE) 是热电器件开发的一个关键挑战.
研究的目的:
- 引入一种使用负热膨胀 (NTE) 粒子来调节CTE并改善热电材料的界面兼容性的新策略.
- 为了提高热电性能,减轻热应力,并在广泛的温度范围内确保接口稳定性.
主要方法:
- 在各种热电材料 (基于Bi2Te3,基于Mg3Sb2,基于PbTe) 中加入预先设计的,无接口反应的NTE粒子.
- 在热循环下评估热电性能,界面应力和长期稳定性.
主要成果:
- 纳入NTE粒子有效提高了热电性能,并减轻了多种材料系统中的热应力.
- 一个经过修改的Mg3(Sb,Bi) 2/Bi0.4Sb1.6Te3模块实现了8.4%的转换效率,减少了71%的接口热应力.
- 经过NTE修改的模块表现出稳定的接口,并且在1000小时的热循环中保持了效率.
结论:
- 拟议的NTE粒子战略提供了一种通用方法,用于提高高温功能模块的界面兼容性.
- 这种方法显著提高了热电设备的性能和长期运行稳定性.
- 该策略适用于其他高温应用,如热屏障涂层和太阳能热光伏设备.
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