Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds

doi:10.1021/acsami.9b10648

SIC OpenIR

	Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds
	Du, Xiaolong; Hu, Ping; Mao, Tao; Song, Qingfeng; Qiu, Pengfei; Shi, Xun; Chen, Lidong
	2019-09-04
Source Publication	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
Volume	11 Issue:35 Pages:32151
Subtype	Article
Abstract	beta-FeSi2 has been considered a promising material for thermoelectric applications, but its thermoelectric performance is greatly limited by the overhigh lattice thermal conductivity. In thermoelectrics, alloying an effective method to reduce the lattice thermal conductivity. In this study, we chose the Co-doped beta-FeSi2 (Fe0.94Co0.06Si2) as the matrix and then prepared a series of Ru alloyed Fe0.94-xRuxCo0.06Si2 (x = 0, 0.005, 0.01, 0.02, and 0.05). X-ray characterizations show that all samples crystallize in the beta-FeSi2 structure. The elemental mappings detect an inhomogeneous Ru distribution in Fe0.89Ru0.05Co0.06Si2, which is attributed to the different Ru solution contents in epsilon-FeSi and alpha-FeSi2+delta before the formation of beta-FeSi2 and the slow diffusion behavior of Ru during the annealing process. The Ru-alloying obviously reduces the lattice thermal conductivity via introducing the mass and strain field fluctuations to interrupt the phonon transports, while it has a weak effect on electrical transport properties. Finally, a maximum zT value of 0.33 at 900 K has been obtained for Fe0.89Ru0.05Co0.06Si2, which is about 27% higher than that for Fe0.94Co0.06Si2.
Keyword	thermoelectric beta-FeSi2 Ru alloying element diffusion lattice thermal conductivity
DOI	10.1021/acsami.9b10648
Language	英语
WOS Research Area	Science & Technology - Other Topics ; Materials Science
Publisher	AMER CHEMICAL SOC
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/26850
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Du, Xiaolong,Hu, Ping,Mao, Tao,et al. Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(35):32151.
APA	Du, Xiaolong.,Hu, Ping.,Mao, Tao.,Song, Qingfeng.,Qiu, Pengfei.,...&Chen, Lidong.(2019).Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds.ACS APPLIED MATERIALS & INTERFACES,11(35),32151.
MLA	Du, Xiaolong,et al."Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds".ACS APPLIED MATERIALS & INTERFACES 11.35(2019):32151.

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