CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Nanoscale heterogeneity in thermoelectrics: the occurrence of phase separation in Fe-doped Ca3Co4O9
Xu, W; Butt, S; Zhu, YC; Zhou, J; Liu, Y; Yu, MJ; Marcelli, A; Lan, JL; Lin, YH; Nan, CW; Xu, W (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.; Xu, W (reprint author), Rome Int Ctr Mat Sci Superstripes, RICMASS, Via Sabelli 119A, I-00185 Rome, Italy.; Nan, CW (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
2016
Source PublicationPHYSICAL CHEMISTRY CHEMICAL PHYSICS
ISSN1463-9076
Volume18Issue:21Pages:14580—14587
Subtype期刊文献
AbstractThe misfit layered cobaltate thermoelectrics are good candidates for high temperature thermoelectric applications. Ca3Co4O9 is a typical compound of this family, which consists of rock salt Ca2CoO3 slabs alternating with hexagonal CoO2 slabs with a large lattice mismatch along the b axis. Each slab is 0.3-0.5 nm thick and shows an inherent structural heterogeneity at the nanoscale. The latter is a key parameter that affects the electrical transport and the heat flow in these misfit structured thermoelectrics. To clarify the physical origin of the thermoelectric performance of iron doped Ca3Co4O9 we combined X-ray near-edge absorption spectroscopy (XANES) and quantum modeling using density functional theory. In contrast to single-site doping, the iron doping first occurs at the Co1 site of the rock salt stab at low doping while at higher doping it prefers the Ca1 site of the rock salt slab. Doping at the Ca1 site modifies the electronic structure tuning the nanoscale structural heterogeneity. This mechanism may open a new route to optimizing the thermoelectric performance of misfit layered thermoelectrics.
KeywordRay-absorption Spectroscopy Misfit-layered Cobaltite Cuprate Perovskites Local-structure Ca3co4-xmxo9 m Spin-entropy Substitution Enhancement Ceramics Diagram
DOI10.1039/c6cp00819d
Indexed BySCI
Language英语
WOS IDWOS:000378102700052
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25781
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorXu, W (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100049, Peoples R China.; Xu, W (reprint author), Rome Int Ctr Mat Sci Superstripes, RICMASS, Via Sabelli 119A, I-00185 Rome, Italy.; Nan, CW (reprint author), Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China.
Recommended Citation
GB/T 7714
Xu, W,Butt, S,Zhu, YC,et al. Nanoscale heterogeneity in thermoelectrics: the occurrence of phase separation in Fe-doped Ca3Co4O9[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2016,18(21):14580—14587.
APA Xu, W.,Butt, S.,Zhu, YC.,Zhou, J.,Liu, Y.,...&Nan, CW .(2016).Nanoscale heterogeneity in thermoelectrics: the occurrence of phase separation in Fe-doped Ca3Co4O9.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,18(21),14580—14587.
MLA Xu, W,et al."Nanoscale heterogeneity in thermoelectrics: the occurrence of phase separation in Fe-doped Ca3Co4O9".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 18.21(2016):14580—14587.
Files in This Item: Download All
File Name/Size DocType Version Access License
Nanoscale heterogene(938KB)期刊论文作者接受稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xu, W]'s Articles
[Butt, S]'s Articles
[Zhu, YC]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu, W]'s Articles
[Butt, S]'s Articles
[Zhu, YC]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu, W]'s Articles
[Butt, S]'s Articles
[Zhu, YC]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Nanoscale heterogeneity in thermoelectrics the occurrence of phase separation in Fe-doped Ca3Co4O9.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.