High-performance lead-free cubic GeTe-based thermoelectric alloy

doi:10.1016/j.xcrp.2022.100902

	High-performance lead-free cubic GeTe-based thermoelectric alloy
	Liu, Ming 4; Zhu, Jianbo 3,4; Cui, Bo 2; Guo, Fengkai 4; Liu, Zihang 4; Zhu, Yuke 4; Guo, Muchun 4; Sun, Yuxin 4; Zhang, Qian 1; Zhang, Yongsheng 3
刊名	CELL REPORTS PHYSICAL SCIENCE
	2022-06-15
卷号	3
DOI	10.1016/j.xcrp.2022.100902
通讯作者	Guo, Fengkai(fkguo@hit.edu.cn) ; Zhang, Yongsheng(yshzhang@theory.issp.ac.cn) ; Sui, Jiehe(suijiehe@hit.edu.cn)
英文摘要	The ferroelectric phase transition of GeTe thermoelectric materials caused by the 4s(2) lone-pair electrons of Ge2+ leads to the sudden change of thermal expansion coefficient, which severely restrains its practical applications. Herein, we demonstrate a successful way to suppress the ferroelectric phase-transition temperature down to below room temperature in GeTe. Our approach involves LiSbTe2 alloying, where the charge distribution is manipulated to reduce the influence of the stereochemical activity of the cation lone-pair electrons on the crystal structure. LiSbTe2 alloying can also promote multi-band convergence and enhance phonon scattering. Consequently, a superior ZT(ave) of 1.38 within 300-773 K is achieved in cubic (GeTe)(0.70)(LiSbTe2)(0.30) alloys, which is significantly higher than the reported results for room temperature or near-room temperature cubic GeTe systems so far. Moreover, the calculated conversion efficiency of 17% is also the highest among all nontoxic p-type polycrystalline thermoelectric materials. This work takes a solid step forward in the application of GeTe.
资助项目	National Natural Science Foundation of China[52130106] ; National Natural Science Foundation of China[52101247] ; National Natural Science Foundation of China[51871082] ; National Natural Science Foundation of China[11774347] ; Fundamental Research Funds for the Central Universities[HIT.OCEF.2021014] ; Heilongjiang Touyan Team
WOS关键词	THERMAL-CONDUCTIVITY ; BAND CONVERGENCE ; POWER ; EFFICIENCY ; SUPPRESSION ; CONVERSION ; MODULES ; FIGURE ; MERIT
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000881723800007
资助机构	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Heilongjiang Touyan Team
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130166]
专题	中国科学院合肥物质科学研究院
通讯作者	Guo, Fengkai; Zhang, Yongsheng; Sui, Jiehe
作者单位	1.Harbin Inst Technol, Inst Mat Genome & Big Data, Sch Mat Sci & Engn, Shenzhen 518055, Peoples R China 2.China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Peoples R China 3.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China 4.Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ming,Zhu, Jianbo,Cui, Bo,et al. High-performance lead-free cubic GeTe-based thermoelectric alloy[J]. CELL REPORTS PHYSICAL SCIENCE,2022,3.
APA	Liu, Ming.,Zhu, Jianbo.,Cui, Bo.,Guo, Fengkai.,Liu, Zihang.,...&Sui, Jiehe.(2022).High-performance lead-free cubic GeTe-based thermoelectric alloy.CELL REPORTS PHYSICAL SCIENCE,3.
MLA	Liu, Ming,et al."High-performance lead-free cubic GeTe-based thermoelectric alloy".CELL REPORTS PHYSICAL SCIENCE 3(2022).