Large Thermal Conductivity Reduction Induced by La/O Vacancies in the Thermoelectric LaCoO3 System

doi:10.1021/ic200178x

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	Large Thermal Conductivity Reduction Induced by La/O Vacancies in the Thermoelectric LaCoO3 System
	Wang, Yang 6,7; Li, Fang 1; Xu, Luxiang 4,5; Sui, Yu 3,7; Wang, Xianjie 7; Su, Wenhui 7; Liu, Xiaoyang 2
刊名	INORGANIC CHEMISTRY
	2011-05-16
卷号	50 期号:10 页码:4412-4416
ISSN号	0020-1669
DOI	10.1021/ic200178x
通讯作者	Wang, Yang(wang_yang@ntu.edu.sg)
英文摘要	A series of compact La/O-vacant La1-xCoO3-y compounds were prepared by a cold high-pressure procedure, and their thermoelectric (TE) properties were investigated. Compared with the ion-substituted hole-type LaCoO3 systems (e.g., La1-xSrxCoO3), the thermal conduction of La1-xCoO3-y is noticeably reduced by the La/O vacancies, whereas the electric transport is less influenced, which results in an efficient ZT enhancement. We demonstrate that the large thermal conductivity reduction originates from the strong point-defect scattering, and La1-xCoO3-y can be rationalized as a partially filled solid solution: La1-x square xCoO3-y square(y), where square denotes a vacancy. Such intrinsic thermal conductivity suppression provides an effective pathway for the design of better TE materials.
WOS研究方向	Chemistry
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000290246600031
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/104022]
专题	金属研究所_中国科学院金属研究所
通讯作者	Wang, Yang
作者单位	1.SW Petr Univ, Sch Petr Engn, Chengdu 610500, Peoples R China 2.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China 3.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 4.Sichuan Normal Univ, Sch Phys & Elect Engn, Chengdu 610068, Peoples R China 5.Sichuan Normal Univ, Lab Low Dimens Struct Phys, Inst Solid State Phys, Chengdu 610068, Peoples R China 6.Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore 7.Harbin Inst Technol, Dept Phys, Ctr Condensed Matter Sci & Technol CCMST, Harbin 150001, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang,Li, Fang,Xu, Luxiang,et al. Large Thermal Conductivity Reduction Induced by La/O Vacancies in the Thermoelectric LaCoO3 System[J]. INORGANIC CHEMISTRY,2011,50(10):4412-4416.
APA	Wang, Yang.,Li, Fang.,Xu, Luxiang.,Sui, Yu.,Wang, Xianjie.,...&Liu, Xiaoyang.(2011).Large Thermal Conductivity Reduction Induced by La/O Vacancies in the Thermoelectric LaCoO3 System.INORGANIC CHEMISTRY,50(10),4412-4416.
MLA	Wang, Yang,et al."Large Thermal Conductivity Reduction Induced by La/O Vacancies in the Thermoelectric LaCoO3 System".INORGANIC CHEMISTRY 50.10(2011):4412-4416.