论文部分内容阅读
热电能量转换技术是一种利用材料实现热能和电能直接相互转换的清洁能源技术。热电材料的性能是决定热电转换效率的关键因素,而热电材料的性能优化涉及电输运和热输运性能的协同优化。文章介绍了近期热电材料中热输运的调控机制和方法,其中重点论述了基于原子分子层次调控热传导的宽频声子散射效应和横波阻尼效应,以及低维结构和复合材料中的基于纳米微米尺度的微结构调控。最后介绍了室温附近热传导的调控机制及其在高效微型热电器件研发中的应用和进展。
Thermoelectric energy conversion technology is a use of materials to achieve thermal energy and direct conversion of clean energy technology. The performance of thermoelectric materials is the key factor that determines the thermoelectric conversion efficiency, while the performance optimization of thermoelectric materials involves the coordinated optimization of electric transport and thermal transport performance. In this paper, the mechanisms and methods of heat transport in thermoelectric materials are introduced. The wide-band phonon scattering effect and shear-wave damping effect based on the heat conduction at the atomic molecular level are discussed in detail, and the low-dimensional structure and composite materials based on nanometer scale Microstructure control. Finally, the regulation mechanism of heat conduction near room temperature and its application and progress in the research and development of highly efficient micro-thermoelectric devices are introduced.