热电器中的活性扩散控制双稳定性,用于可持续的热收集
Longquan Wang1, Airan Li1, Xinzhi Wu1
1Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, 305-0044, Japan.
使用Mg3(Bi,Sb) 2的热电发电机通过引入一个Mg层来防止扩散,从而实现了卓越的长期稳定性. 这一突破使废热能收获的持续高功率密度和转换效率成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 收集能源 收集能源
- 固态物理 固态物理
背景情况:
- 热电技术将废热转化为电力,这对全球可持续性至关重要.
- 由于元素扩散,降低性能,长期稳定性是一个重大挑战.
- 现有的研究往往侧重于接口或材料稳定性,而不是两者.
研究的目的:
- 在高性能Mg3{\displaystyle Mg3} ,Bi,Sb) 2的热电材料中实现双重和优越的稳定性.
- 为了克服热电器件元素扩散的局限性.
- 推进热电能采集的实际应用.
主要方法:
- 在Mg3(Bi,Sb) 2热电材料的结合处引入一个Mg层.
- 研究抑制有害Mg扩散的研究.
- 在材料中补偿Mg损失.
- 在100天内测试连接点和材料的稳定性.
主要成果:
- 在Mg3(Bi,Sb) 2中实现了双重和优越的稳定性,超过了之前的研究.
- 层有效地抑制了的扩散,并补偿了材料损失.
- 稳定连接点和材料保持了100多天的性能.
- 一个使用30天老化的Mg3(Bi,Sb) 2的热电模块保持了0.45W cm-2的功率密度和8.6%的转换效率.
结论:
- 热电连接点和材料的全面稳定对于实际应用至关重要.
- 引入Mg层为热电结工程提供了一种新的方法.
- 这项工作显著提高了用于可再生能源和废热源的热电能采集的可行性.
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