Low lattice thermal conductivity and enhanced thermoelectric performance of SnTe via chemical electroless plating of Ag

作     者：Bang-Zhou Tian Xu-Ping Jiang Jie Chen Han Gao Ze-Gao Wang Jun Tang Da-Li Zhou Lei Yang Zhi-Gang Chen Bang-Zhou Tian;Xu-Ping Jiang;Jie Chen;Han Gao;Ze-Gao Wang;Jun Tang;Da-Li Zhou;Lei Yang;Zhi-Gang Chen

作者机构：School of Materials Science&EngineeringSichuan UniversityChengdu 610064China Key Laboratory of Material Physics of Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Key Laboratory of Radiation Physics and TechnologyMinistry of EducationInstitute of Nuclear Science and TechnologySichuan UniversityChengdu 610064China Centre for Future MaterialsUniversity of Southern QueenslandSpringfield CentralQLD 4300Australia 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第1期

页      面：86-95页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.51802205) Australian Research Council 

主　　题：Thermoelectric SnTe Electroless plating Energy filtering effect Interface engineering 

摘      要：Interface engineering has been regarded as an effective strategy to manipulate the thermoelectric performance of ***,we use a facile chemical electroless plating and a spark plasma sintering process to fabricate Ag-plated SnTe *** sintering,a small amount of plated Ag can be doped into SnTe to suppress the Sn vacancies and the others form Ag precipitates with a size distribution from nanoscale to microscale,which introduces Ag/SnTe interfaces to enhance the Seebeck coefficient via energy filtering ***,these structures result in strong scattering to reach a low lattice thermal conductivity of-0.62 W·m^(–1)·K^(–1).Consequently,a maximum figure of merit(zT)of-0.67 at 823 K is achieved in 2 wt%Ag-plated SnTe,which is-60%higher than that of pristine ***,the microhardness indentation test results show that the mean microhardness of 2 wt%Ag-plated SnTe is HV 64.26,which is much higher than that of pristine SnTe,indicating that Ag electroless plating can improve the mechanical properties of *** work has provided a facile and eco-friendly method to realize the interface engineering for manipulating the thermoelectric and mechanical properties of SnTe.