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	Twin Engineering in Solution-Synthesized Nonstoichiometric Cu5FeS4 Icosahedral Nanoparticles for Enhanced Thermoelectric Performance
	Zhang, Aijuan1; Zhang, Bin4; Lu, Wei5; Xie, Dandan1; Ou, Hongxia1; Han, Xiaodong4; Dai, Jiyan5; Lu, Xu1; Han, Guang2; Wang, Guoyu3,6
	2018-03-07
摘要	A facile colloidal solution method has been developed for the fast, scalable synthesis of orthorhombic@cubic core-shell nonstoichiometric Cu5FeS4 icosahedral nanoparticles. Such nanoparticles contain high-density twin boundaries in the form of fivefold twins. Spark plasma sintering consolidates the nanoparticles into nanostructured pellets, which retain high-density twin boundaries and a tuned fraction of the secondary phase Fe-deficient cubic Cu5FeS4. As a result, the thermal and electrical transport properties are synergistically optimized, leading to an enhanced zT of approximate to 0.62 at 710 K, which is about 51% higher than that of single-phase Cu5FeS4. This study provides an energy-efficient approach to realize twin engineering in nonstoichiometric Cu5FeS4 nanomaterials for high-performance thermoelectrics.
关键词	Cu5FeS4 nanomaterials icosahedron thermoelectrics twin engineering
DOI	10.1002/adfm.201705117
发表期刊	ADVANCED FUNCTIONAL MATERIALS
ISSN	1616-301X
卷号	28期号:10页码:8
收录类别	SCI
WOS记录号	WOS:000426603700008
语种	英语