Enhancing the thermoelectric performance of CoSb3-based skutterudite by decoupling the electrical and thermal properties by embedding Cu nanoparticles

Zhao，Yiwei2; Liu，Yong2; Ma，Hongyu2; Deng，Shuping2; Wang，Haiying1; Xiong，Rui2; Huang，Shan2,3

2021

10.1016/j.ceramint.2021.06.242

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

CoNiSb embedded with Cu nanoparticles (NPs) was synthesized by applying a hydrothermal process followed by spark plasma sintering. The effects of Cu NPs on the electrical and thermal transport properties of the CoNiSb matrix were investigated in the temperature range of 303–773 K. Cu NPs introduced into the CoNiSb matrix slightly decreased the electrical conductivity and significantly enhanced the Seebeck coefficient by the energy filtering effect, leading to an improved power factor at 773 K. Furthermore, a significant decrease in the thermal conductivity was realized by increasing the number of grain boundaries. These favorable effects contributed to the improvement in ZT to a value ~57% higher than that of pristine CoNiSb. The highest ZT value of 1.02 was achieved by incorporating 4.5 wt% of Cu NPs in CoNiSb at 773 K. Thus, decoupling the electrical and thermal transport properties of thermoelectric materials is a viable strategy for optimizing the ZT value.

Cu NPs Decoupling properties Energy filtering Hydrothermal methods

SCI ; EI

英语

其他

National Natural Science Foundation of China[11774270,11774271,51571152]

Materials Science

Materials Science, Ceramics

WOS:000693434600005

ELSEVIER SCI LTD

20212710592387

Antimony compounds ; Grain boundaries ; Spark plasma sintering ; Synthesis (chemical) ; Thermal conductivity ; Thermoelectricity

Thermodynamics:641.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Nanotechnology:761 ; Chemical Reactions:802.2 ; Solid State Physics:933

MATERIALS SCIENCE

2-s2.0-85108999968

Scopus

1.School of Physics,Henan Normal University,Xinxiang,453002,China
2.Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology,Wuhan University,Wuhan,430072,China
3.Department of Physics,South University of Science and Technology,Shenzhen,518055,China

Zhao，Yiwei,Liu，Yong,Ma，Hongyu,et al. Enhancing the thermoelectric performance of CoSb3-based skutterudite by decoupling the electrical and thermal properties by embedding Cu nanoparticles[J]. CERAMICS INTERNATIONAL,2021,47(20):28268-28273.

Zhao，Yiwei.,Liu，Yong.,Ma，Hongyu.,Deng，Shuping.,Wang，Haiying.,...&Huang，Shan.(2021).Enhancing the thermoelectric performance of CoSb3-based skutterudite by decoupling the electrical and thermal properties by embedding Cu nanoparticles.CERAMICS INTERNATIONAL,47(20),28268-28273.

Zhao，Yiwei,et al."Enhancing the thermoelectric performance of CoSb3-based skutterudite by decoupling the electrical and thermal properties by embedding Cu nanoparticles".CERAMICS INTERNATIONAL 47.20(2021):28268-28273.