Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds

doi:10.1021/acsami.9b10648

	Ru Alloying Induced Enhanced Thermoelectric Performance in FeSi2-Based Compounds
	Du, Xiaolong; Hu, Ping; Mao, Tao; Song, Qingfeng; Qiu, Pengfei; Shi, Xun; Chen, Lidong
刊名	ACS APPLIED MATERIALS & INTERFACES
	2019-09-04
卷号	11 期号:35 页码:32151
关键词	thermoelectric beta-FeSi2 Ru alloying element diffusion lattice thermal conductivity
ISSN号	1944-8244
DOI	10.1021/acsami.9b10648
文献子类	Article
英文摘要	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.
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26850]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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.