Enhanced Thermoelectric and Mechanical Properties in Yb0.3Co4Sb12 with In Situ Formed CoSi Nanoprecipitates

Qin, Dandan1; Wu, Haijun2; Cai, Songting3; Zhu, Jianbo1; Cui, Bo3; Yin, Li4; Qin, Haixu1; Shi, Wenjing1; Zhang, Yang2; Zhang, Qian4; Liu, Weishu5; Cao, Jian1; Pennycook, Stephen J.2; Cai, Wei3; Sui, Jiehe1

2019-10

10.1002/aenm.201902435

Advanced Energy Materials   影响因子和分区

1614-6832

1614-6840

Filled Skutterudites are one group of the most promising thermoelectric materials in real power generation applications. Herein, homogeneously dispersed multiscale CoSi nanostructures are successfully embedded into grains of the classic skutterudite system, Yb0.3Co4Sb12, by the in situ precipitation method. Such nanoprecipitates contribute much to the synergistic enhancement of thermoelectric and mechanical properties. On one hand, by the fine deployment of multiscale CoSi nanoparticles, the lattice thermal conductivity is significantly depressed almost to the theoretical limit because of the disrupted propagation of the heat-carrying phonons at phase boundaries. On the other hand, low-energy electrons are effectively screened due to the energy filtering effect by the interfacial potential barrier between the CoSi nanoprecipitate and the matrix, resulting in an enhanced power factor. Taken together, an enhanced peak ZT value of approximate to 1.5 at 873 K for the Yb0.3Co4Sb12/0.05CoSi composite is obtained with a high average ZT approximate to 0.95 between 300 and 873 K through decoupling the electrical and thermal transport parameters. Moreover, such a microstructure with multiscale CoSi nanoparticles shows significantly improved mechanical properties owing to particle hardening, making it more competitive for practical applications.

lattice thermal conductivity mechanical properties nanoprecipitates skutterudites thermoelectric properties

SCI ; EI

英语

其他

National Natural Science Foundation of China[51771065] ; National Natural Science Foundation of China[51622101] ; National Natural Science Foundation of China[51871082]

Chemistry ; Energy & Fuels ; Materials Science ; Physics

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000490006500001

WILEY-V C H VERLAG GMBH

20194407596147

Age hardening ; Antimony compounds ; Crystal lattices ; Electrons ; Mechanical properties ; Nanoparticles ; Precipitation (chemical) ; Skutterudites ; Thermal conductivity ; Thermoelectric equipment ; Thermoelectricity ; Ytterbium compounds

Minerals:482.2 ; Metallurgy and Metallography:531 ; Thermoelectric Energy:615.4 ; Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Solid State Physics:933 ; Crystal Lattice:933.1.1 ; Materials Science:951

Web of Science

1.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Heilongjiang, Peoples R China
2.Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore
3.Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Harbin 150001, Heilongjiang, Peoples R China
4.Harbin Inst Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
5.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Qin, Dandan,Wu, Haijun,Cai, Songting,et al. Enhanced Thermoelectric and Mechanical Properties in Yb0.3Co4Sb12 with In Situ Formed CoSi Nanoprecipitates[J]. Advanced Energy Materials,2019,9(42).

Qin, Dandan.,Wu, Haijun.,Cai, Songting.,Zhu, Jianbo.,Cui, Bo.,...&Sui, Jiehe.(2019).Enhanced Thermoelectric and Mechanical Properties in Yb0.3Co4Sb12 with In Situ Formed CoSi Nanoprecipitates.Advanced Energy Materials,9(42).

Qin, Dandan,et al."Enhanced Thermoelectric and Mechanical Properties in Yb0.3Co4Sb12 with In Situ Formed CoSi Nanoprecipitates".Advanced Energy Materials 9.42(2019).