Tuning the Saturated Vapor Pressure of Solvothermal Synthesis to Boost the Thermoelectric Performance of Pristine Bi2Te3 Polycrystals by Anisotropy Strengthening

Yuan, Jing1; Shi, Xiao-Lei2; Wang, De-Zhuang1; Liu, Wei-Di3; Li, Meng2; Chen, Wenyi4; Yang, Qishuo4,5,6; Wang, Yifeng7; Liu, Qingfeng1; Chen, Zhi-Gang2

2023-05-25

10.1021/acsaem.3c00755

ACS APPLIED ENERGY MATERIALS   影响因子和分区

2574-0962

Bi2Te3 is one of the most promisingthermoelectricmaterials that target near-room-temperature applications due to itshigh thermoelectric potential at these temperatures. In this work,we report a new route to significantly improve the thermoelectricperformance of pristine Bi2Te3 polycrystals.We design the mixed solutions composed of H2O and ethyleneglycol (EG) as novel solvents to solvothermally synthesize Bi2Te3 crystalline microplates. It is found that theaddition of H2O can boost the saturated vapor pressureof the mixed solutions during the solvothermal synthesis and significantlydrive the crystal growth of Bi2Te3 microplatesalong their in-plane directions due to the tuning of kinetic conditions.Such a unique route strengthens the anisotropy of the bulk materialssintered from these microplates, leading to improved carrier mobilityof >170 cm(2) V-1 s(-1) and in turn a high electrical conductivity of >1400 S cm(-1) at room temperature. Combined with a high absoluteSeebeck coefficientof >140 mu V K-1, a competitively high powerfactor of similar to 30 mu W cm(-1) K-2 can be achieved in the solvothermally synthesized samples. Besides,compared with the bulk material sintered from commercial Bi2Te3 powders with a figure of merit of 0.2 at 369 K, thefigure of merit of the bulk material developed in this work is significantlyimproved by similar to 167% (0.56), indicating great potential for practicalapplications. This work paves a new way and fills the gap of boostingthe thermoelectric performance of pristine Bi2Te3.

thermoelectric Bi2Te3 texturing structure performance

SCI ; EI

英语

其他

National Natural Science Foundation of China["52272040","51972170"]

Chemistry ; Energy & Fuels ; Materials Science

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

WOS:001005201200001

AMER CHEMICAL SOC

20232614308841

Anisotropy ; Bismuth compounds ; Hydrostatic pressure ; Materials handling equipment ; Tellurium compounds ; Thermoelectricity

Liquid Dynamics:631.1.1 ; Materials Handling Equipment:691.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Organic Compounds:804.1 ; Physical Properties of Gases, Liquids and Solids:931.2

Web of Science

1.Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211800, Peoples R China
2.Queensland Univ Technol, Sch Chem & Phys, Brisbane, Qld 4000, Australia
3.Univ Queensland, Australian Inst Bioengn & Nanotechnol, Brisbane, Qld 4072, Australia
4.Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China
7.Nanjing Tech Univ, Coll Mat Sci & Engn, Nanjing 211816, Peoples R China

Yuan, Jing,Shi, Xiao-Lei,Wang, De-Zhuang,et al. Tuning the Saturated Vapor Pressure of Solvothermal Synthesis to Boost the Thermoelectric Performance of Pristine Bi2Te3 Polycrystals by Anisotropy Strengthening[J]. ACS APPLIED ENERGY MATERIALS,2023,6(11):6227-6236.

Yuan, Jing.,Shi, Xiao-Lei.,Wang, De-Zhuang.,Liu, Wei-Di.,Li, Meng.,...&Chen, Zhi-Gang.(2023).Tuning the Saturated Vapor Pressure of Solvothermal Synthesis to Boost the Thermoelectric Performance of Pristine Bi2Te3 Polycrystals by Anisotropy Strengthening.ACS APPLIED ENERGY MATERIALS,6(11),6227-6236.

Yuan, Jing,et al."Tuning the Saturated Vapor Pressure of Solvothermal Synthesis to Boost the Thermoelectric Performance of Pristine Bi2Te3 Polycrystals by Anisotropy Strengthening".ACS APPLIED ENERGY MATERIALS 6.11(2023):6227-6236.