Twin Engineering in Solution-Synthesized Nonstoichiometric Cu5FeS4Icosahedral Nanoparticles for Enhanced Thermoelectric Performance

Aijuan Zhang; Bin Zhang; Wei Lu; Dandan Xie; Hongxia Ou; Xiaodong Han; Jiyan Dai; Xu Lu; Guang Han; Guoyu Wang; Xiaoyuan Zhou

doi:10.1002/adfm.201705117

Twin Engineering in Solution-Synthesized Nonstoichiometric Cu₅FeS₄Icosahedral Nanoparticles for Enhanced Thermoelectric Performance

Aijuan Zhang
, Bin Zhang
, Wei Lu
, Dandan Xie
, Hongxia Ou
, Xiaodong Han
, Jiyan Dai
, Xu Lu
, Guang Han
, Guoyu Wang
, Xiaoyuan Zhou

Research output: Journal article publication › Journal article › Academic research › peer-review

82 Citations (Scopus)

Abstract

A facile colloidal solution method has been developed for the fast, scalable synthesis of orthorhombic@cubic core–shell nonstoichiometric Cu ₅FeS ₄ 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 Cu ₅FeS ₄. As a result, the thermal and electrical transport properties are synergistically optimized, leading to an enhanced zT of ≈0.62 at 710 K, which is about 51% higher than that of single-phase Cu ₅FeS ₄. This study provides an energy-efficient approach to realize twin engineering in nonstoichiometric Cu ₅FeS ₄ nanomaterials for high-performance thermoelectrics.

Original language	English
Article number	1705117
Journal	Advanced Functional Materials
Volume	28
Issue number	10
DOIs	https://doi.org/10.1002/adfm.201705117
Publication status	Published - 7 Mar 2018

Keywords

Cu FeS
icosahedron
nanomaterials
thermoelectrics
twin engineering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Condensed Matter Physics
Electrochemistry

More information

10.1002/adfm.201705117

http://hdl.handle.net/10397/100359

Cite this

@article{176d46d010a1420684ffc44995d08e21,

title = "Twin Engineering in Solution-Synthesized Nonstoichiometric Cu5FeS4Icosahedral Nanoparticles for Enhanced Thermoelectric Performance",

abstract = "A facile colloidal solution method has been developed for the fast, scalable synthesis of orthorhombic@cubic core–shell nonstoichiometric Cu 5FeS 4 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 Cu 5FeS 4. As a result, the thermal and electrical transport properties are synergistically optimized, leading to an enhanced zT of ≈0.62 at 710 K, which is about 51\% higher than that of single-phase Cu 5FeS 4. This study provides an energy-efficient approach to realize twin engineering in nonstoichiometric Cu 5FeS 4 nanomaterials for high-performance thermoelectrics. ",

keywords = "Cu FeS, icosahedron, nanomaterials, thermoelectrics, twin engineering",

author = "Aijuan Zhang and Bin Zhang and Wei Lu and Dandan Xie and Hongxia Ou and Xiaodong Han and Jiyan Dai and Xu Lu and Guang Han and Guoyu Wang and Xiaoyuan Zhou",

year = "2018",

month = mar,

day = "7",

doi = "10.1002/adfm.201705117",

language = "English",

volume = "28",

journal = "Advanced Functional Materials",

issn = "1616-301X",

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TY - JOUR

T1 - Twin Engineering in Solution-Synthesized Nonstoichiometric Cu5FeS4Icosahedral Nanoparticles for Enhanced Thermoelectric Performance

AU - Zhang, Aijuan

AU - Zhang, Bin

AU - Lu, Wei

AU - Xie, Dandan

AU - Ou, Hongxia

AU - Han, Xiaodong

AU - Dai, Jiyan

AU - Lu, Xu

AU - Han, Guang

AU - Wang, Guoyu

AU - Zhou, Xiaoyuan

PY - 2018/3/7

Y1 - 2018/3/7

N2 - A facile colloidal solution method has been developed for the fast, scalable synthesis of orthorhombic@cubic core–shell nonstoichiometric Cu 5FeS 4 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 Cu 5FeS 4. As a result, the thermal and electrical transport properties are synergistically optimized, leading to an enhanced zT of ≈0.62 at 710 K, which is about 51% higher than that of single-phase Cu 5FeS 4. This study provides an energy-efficient approach to realize twin engineering in nonstoichiometric Cu 5FeS 4 nanomaterials for high-performance thermoelectrics.

AB - A facile colloidal solution method has been developed for the fast, scalable synthesis of orthorhombic@cubic core–shell nonstoichiometric Cu 5FeS 4 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 Cu 5FeS 4. As a result, the thermal and electrical transport properties are synergistically optimized, leading to an enhanced zT of ≈0.62 at 710 K, which is about 51% higher than that of single-phase Cu 5FeS 4. This study provides an energy-efficient approach to realize twin engineering in nonstoichiometric Cu 5FeS 4 nanomaterials for high-performance thermoelectrics.

KW - Cu FeS

KW - icosahedron

KW - nanomaterials

KW - thermoelectrics

KW - twin engineering

UR - https://www.scopus.com/pages/publications/85042920878

U2 - 10.1002/adfm.201705117

DO - 10.1002/adfm.201705117

M3 - Journal article

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