Open AccessThermoelectric properties of high pressure synthesized lithium and calcium double-filled CoSb3
Author(s) -
Xiaohui Li,
Yulong Kang,
Chen Chen,
Jianghua Li,
Long Zhang,
Fengrong Yu,
Dongli Yu,
Yongjun Tian,
Bo Xu
Publication year - 2017
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.4974501
Subject(s) - skutterudite , thermoelectric effect , materials science , lithium (medication) , high pressure , thermoelectric materials , work (physics) , ambient pressure , electrical resistivity and conductivity , thermal conductivity , optoelectronics , analytical chemistry (journal) , thermodynamics , chemistry , composite material , electrical engineering , medicine , physics , engineering , endocrinology , chromatography
Lithium and calcium are inefficient filling elements of CoSb3 at ambient pressure, but show nice filling behavior under high pressure. In this work, we synthesized Li/Ca double-filled CoSb3 with high pressure synthesis method. The products show the skutterudite structure of Im3¯ symmetry. Thermoelectric properties were effectively enhanced through Li and Ca co-filling. For the optimal Li0.08Ca0.18Co4Sb12 sample, the power factor maintains a relatively high value over the whole measurement temperature range and peaks at 4700μWm−1K−2, meanwhile the lattice thermal conductivity is greatly suppressed, leading to a maximal ZT of 1.18 at 700 K. Current work demonstrates high pressure synthesis as an effective method to produce multiple elemental filled CoSb3 skutterudites
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