Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication

doi:10.1063/1.3291125

IMR OpenIR

	Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication
	Wang, Yang 1; Sui, Yu 1,2; Wang, Xianjie 1; Su, Wenhui 1; Liu, Xiaoyang 3
通讯作者	Sui, Yu(suiyu@hit.edu.cn)
	2010-02-01
发表期刊	JOURNAL OF APPLIED PHYSICS
ISSN	0021-8979
卷号	107 期号:3 页码:9
摘要	A series of Fe, Mn, and Cu doped Ca3Co4O9+delta samples, Ca-3(Co,M)(4)O9+delta (M=Fe, Mn, and Cu), were fabricated by cold high-pressure compacting technique. Their thermoelectric properties were investigated from room temperature up to 1000 K. The cold high-pressure compacting method is advantageous to increasing density and texture, in favor of the improvement of thermoelectric performance. The electrical transport measurements indicate that Fe/Mn substitutes for Co mainly in [CoO2] layers whereas the substitution of Cu for Co takes place in [Ca2CoO3] layers. The thermoelectric properties as well as electronic correlations depend not only on the substitution ion but also the Co site that is replaced. Thermopower can be well calculated by the carrier effective mass according to Boltzmann transport model, indicating that the electronic correlation plays a crucial role in the unusual thermoelectric characteristics of this system. From the changes in thermopower, resistivity, and thermal conductivity, thermoelectric performance of Ca3Co4O9+delta is efficiently improved by these transition metals doping. Fe doped samples possess the highest ZT values. Combining cold high-pressure technique, ZT of Ca3Co3.9Fe0.1O9+delta can reach similar to 0.4 at 1000 K, which is quite large among ceramic oxides, suggesting that Fe doped Ca3Co4O9+delta could be a promising candidate for thermoelectric applications at elevated temperatures.
关键词	Boltzmann equation calcium compounds compaction copper density doping high-pressure techniques iron manganese texture thermoelectric power
资助者	National Natural Science Foundation of China ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
DOI	10.1063/1.3291125
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[50672019] ; National Natural Science Foundation of China[10804024] ; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
WOS研究方向	Physics
WOS类目	Physics, Applied
WOS记录号	WOS:000274517300052
出版者	AMER INST PHYSICS
引用统计	被引频次：107[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/101399
专题	中国科学院金属研究所
通讯作者	Sui, Yu
作者单位	1.Harbin Inst Technol, CCMST, Dept Phys, Harbin 150001, Peoples R China 2.Acad Sinica, Int Ctr Mat Phys, Shenyang 110015, Peoples R China 3.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yang,Sui, Yu,Wang, Xianjie,et al. Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication[J]. JOURNAL OF APPLIED PHYSICS,2010,107(3):9.
APA	Wang, Yang,Sui, Yu,Wang, Xianjie,Su, Wenhui,&Liu, Xiaoyang.(2010).Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication.JOURNAL OF APPLIED PHYSICS,107(3),9.
MLA	Wang, Yang,et al."Enhanced high temperature thermoelectric characteristics of transition metals doped Ca3Co4O9+delta by cold high-pressure fabrication".JOURNAL OF APPLIED PHYSICS 107.3(2010):9.