热电材料可以实现热能和电能相互转换，具有器件体积小、可靠性高、无噪音等优点，可用于废热发电和制冷，已在航天、国防、半导体制冷等领域获得应用。热电材料的研究已经取得了长足的进步，但热电器件研究远远低于材料的发展，这是因为制备器件要求材料具有热电性能稳定、可批量制备、力学性能满足可加工的要求。然而，通常采用多元素掺杂、固溶等方式制备高ZT值热电材料，导致批量制备高ZT值热电材料存在困难，所以高性能热电器件发展缓慢。. 针对上述问题，本项目提出在CoSb3、SnSe等颗粒表面原位包裹磁性纳米粒子作为催化剂，采用CVD合成碳管解决CNTs在基体中难以分散的问题，在晶界处构筑异质界面，同时利用催化剂磁性纳米粒子形成电子多重散射中心，实现能量过滤效应，增强声子散射，降低声子热导率，实现热电性能和力学性能协同提高，制备出高性能热电器件，加快推动高性能热电器件的发展和应用进程。

With the ability to achieve mutual conversion between thermal and electrical energy, as well as the advantages of small volume, no-noise, high reliability, et al, thermoelectric materials have been applied in the field of aerospace engineering, national defense, semiconductor refrigeration and waste heat power generation. The research of thermoelectric materials have made considerable strides in recent years, however, the research of the thermoelectric device can not satisfy the development of materials, which can be attributed to the lack of stable thermoelectric properties, batch production, and excellent mechanical property. Generally, multi-element doping, solid solution method, et al, are employed to the enhance ZT value, which makes it difficult to prepare thermoelectric materials with high ZT value in high field. As a result, high-performance thermoelectric materials develop slowly...In view of the above questions, this project is proposed to enhance the thermoelectric and mechanical properties by in-situ wrapping magnetic nanoparticles, which is employed as catalyst, in the surface of thermoelectric particles (CoSb3, SnSe, et al). Besides, carbon nanotube is in-situ synthesized by chemical vapor deposition method, and heterogenous interface is formed at grain boundaries. Meanwhile, magnetic nanoparticles embedded in thermoelectric materials will act as multiple scattering centres of the electrons, which can realize energy filtering effect, enhance phonon scattering, and consequently decrease the thermal conductivity of the lattice. The thermoelectric and mechanical properties can be enhanced simultaneously, and it is favorable to expedite the development and application of high-performance thermoelectric materials.