Porous Thermoelectric Zintl: YbCd2Sb2

Feng, Jianghe1,2; Wang, Wu1; Huang, Shan1,2; Jiang, BinBin1,2; Zhu, Bin1,2; Zhou, Yi1; Cui, Juan1; Lin, PeiJian1; Xie, Lin1; He, JiaQing1

2021-01-25

10.1021/acsaem.0c02825

ACS Applied Energy Materials   影响因子和分区

2574-0962

The simultaneous reduction of the lattice thermal conductivity and maintenance of the electrical conductivity are great challenges for porous thermoelectric materials in achieving superior thermoelectric performance. Herein, by taking advantage of the low melting temperature of the inevitable impurity in a YbCd2Sb2 Zintl compound, a porous structure (similar to 11%) with varying sizes, irregular shape, and oriented pores was investigated by controllable annealing. Especially, a high density of strain lines was introduced and incorporated with porous structures to achieve a dramatic reduction of lattice thermal conductivity (similar to 40% @ 673 K). Moreover, the carrier concentration was doubled by annealing, which resulted in the involvement of low-lying valence bands for charge transport and enhancing the power factor. This porous YbCd2Sb2 realizes the highest on record figure of merit (zT) (higher than unity @ 673 K) and average zT (0.61 in the range of 323-673 K) among pristine p-AB(2)C(2) (A = Eu, Yb, Mg, Ca, Sr, and Ba; B = Mn Mg, Zn, and Cd; C = Sb and Bi) Zintls.

porous thermoelectric Zintl annealing strain lines electronic performance

SCI ; EI

英语

第一 ; 通讯

leading talents of the Guangdong Province Program[00201517] ; Natural Science Foundation of Guangdong Province[2015A030308001] ; Science, Technology and Innovation Commission of Shenzhen Municipality["JCYJ201508311142508365","KQTD2016022619565991"] ; Natural Science Foundation of China[51632005,11874194,51802146]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000613720100099

AMER CHEMICAL SOC

20210509859085

Antimony compounds ; Cadmium compounds ; Carrier concentration ; Carrier transport ; Crystal lattices ; Porosity ; Thermoelectricity ; Ytterbium compounds

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Crystal Lattice:933.1.1

Web of Science

1.Southern Univ Sci & Technol, Dept Phys, Shenzhen Key Lab Thermoelect Mat, Shenzhen 518055, Peoples R China
2.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China

Feng, Jianghe,Wang, Wu,Huang, Shan,et al. Porous Thermoelectric Zintl: YbCd2Sb2[J]. ACS Applied Energy Materials,2021,4(1):913-920.

Feng, Jianghe.,Wang, Wu.,Huang, Shan.,Jiang, BinBin.,Zhu, Bin.,...&He, JiaQing.(2021).Porous Thermoelectric Zintl: YbCd2Sb2.ACS Applied Energy Materials,4(1),913-920.

Feng, Jianghe,et al."Porous Thermoelectric Zintl: YbCd2Sb2".ACS Applied Energy Materials 4.1(2021):913-920.