Solubility Study of Y in n-type YxCe0.15Co4Sb12 Skutterudites and its Effect on Thermoelectric Properties
Solubility Study of Y in n-type YxCe0.15Co4Sb12 Skutterudites and its Effect on Thermoelectric Properties
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Y在n型YxCe0.15Co4Sb12方钴矿中的溶解度研究及其对热电性能的影响
DOI:
10.1016/j.mtphys.2020.100206
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发表时间:
2020-06
影响因子:
11.5
通讯作者:
Jiehe Sui
中科院分区:
文献类型:
--
作者:
D;an Qin;Wenjing Shi;Wenhua Xue;Haixu Qin;Jian Cao;Wei Cai;Yumei Wang;Jiehe Sui
Low-cost Ce has been proved to be an effective auxiliary filler for performance tuning in CoSb3-based skutterudite, one of the most promising thermoelectric materials at medium temperature. However, the low solubility of Ce in CoSb3makes its overall thermoelectric properties so far inferior to that with expensive and scarce Yb filler. Herein, using non-equilibrium processing, we successfully synthesized a series of double-filled skutterudites with Ce as the dominating filling element and Y as the auxiliary filler. Our investigation shows that Y filling not only optimizes the carrier concentration and thus enhances the overall power factor but also introduces additional phonon scattering and hence leads to significantly suppressed lattice thermal conductivity. The concurrently optimized electrical and thermal properties realize the maximumZTof ~1.37 at 873 K in the Y0.05Ce0.15Co4Sb12sample, prevailing over the other involved Ce single- or even double-filled skutterudites, which will potentially facilitate a widespread application of filled skutterudites.
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影响因子:
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通讯作者:
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DOI:
10.1088/0022-3727/42/10/105408
发表时间:
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期刊:
Journal of Physics D: Applied Physics
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通讯作者:
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