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Thermoelectric Properties of Nano-grained Mooihoekite Cu9Fe9S16
Qiu, XX; Qiu, PF; Deng, TT; Huang, H; Du, XL; Shi, X; Chen, LD
2020-07-31
Source PublicationZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
ISSN0044-2313
Issue14Pages:1116
SubtypeArticle
AbstractCu-Fe-S-based compounds gain the interest from thermoelectric community because all the consisting elements, Cu, Fe, and S, are non-toxic and earth-abundant. Comparing with CuFeS2 and Cu5FeS4, the investigation on Cu9Fe9S16 is very rare. In this work, a series of Cu9-xFe9+xS16 samples were fabricated by means of melting-annealing process. Their phase composition, microstructure, electrical and thermal transport properties were systematically investigated. X-ray measurement confirms that all samples are phase pure. Transmission electron microscopy characterization indicates that the fabricated Cu9Fe9S16 has a natural nanostructure. Cu9Fe9S16 shows semiconducting-like electrical transport behavior and intrinsically low lattice thermal conductivity. Beyond the numerous boundaries between nanosized grains, the existence of low-frequency optical phonons is also responsible for the intrinsically low lattice thermal conductivity. Doping Fe at the Cu-sites in Cu9Fe9S16 significantly alters the electrical transport properties by introducing extra carriers. A peak dimensionless figure of merit zT value of 0.21 is obtained at 800 K for pure Cu9Fe9S16, which is comparable with that for CuFeS2.
DOI10.1002/zaac.202000017
WOS KeywordCRYSTAL-STRUCTURE ; EARTH-ABUNDANT ; PERFORMANCE ; CHALCOPYRITE
Language英语
WOS Research AreaChemistry
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28153
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Qiu, XX,Qiu, PF,Deng, TT,et al. Thermoelectric Properties of Nano-grained Mooihoekite Cu9Fe9S16[J]. ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE,2020(14):1116.
APA Qiu, XX.,Qiu, PF.,Deng, TT.,Huang, H.,Du, XL.,...&Chen, LD.(2020).Thermoelectric Properties of Nano-grained Mooihoekite Cu9Fe9S16.ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE(14),1116.
MLA Qiu, XX,et al."Thermoelectric Properties of Nano-grained Mooihoekite Cu9Fe9S16".ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE .14(2020):1116.
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