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《国家科学评论(英文版)》 2017-04
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Eco-friendly high-performance silicide thermoelectric materials

Wei Liu;Kang Yin;Qingjie Zhang;Ctirad Uher;Xinfeng Tang;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology;Department of Physics, University of Michigan;  
Silicide-based thermoelectrics are examples of cost-efficient and environmentally friendly new energy materials, which can be used for power-generation applications in the range of 500–800 K. We review the research focusing on the exploration of n-type Mg_2IV-based solid solutions(IV = Si, Ge and Sn) and summarize the most prominent discoveries achieved so far in their studies. Owing to their superior performance compared to other silicides, including p-type Mg_2IV, higher manganese silicides(HMS) are commonly considered as a suitable p-type material to be used in thermoelectric modules in conjunction with n-type Mg_2IV-based solid solutions for mid-temperature power-generation applications. We describe the strategies used to improve the thermal and electronic transport properties of n-type Mg_2IV-based solid solutions and mention some key features of HMS. We also point out the importance of mechanical properties and thermal stability of this family of materials and offer perspectives on the future research work to further improve their performance.
【Fund】: supported by the National Basic Research Program of China (973 Program) (2013CB632502);; the Programme of Introducing Talents of Discipline to Universities (B07040);; the National Natural Science Foundation of China (51402222 51172174 51521001 and 51632006);; the support provided by the project of Energy Conversion-Efficient TE Materials for Vehicle Waste Heat Recover under the U.S.-China Clean Energy Research Center (DEPI0000012)
【CateGory Index】: TB34;TQ127.2
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