Enhancement of Thermoelectric Properties in n-type NbCoSn Half-Heusler Compounds via Ta Alloying
Enhancement of Thermoelectric Properties in n-type NbCoSn Half-Heusler Compounds via Ta Alloying
复制标题
通过 Ta 合金化增强 n 型 NbCoSn Half Heusler 化合物的热电性能
DOI:
10.1021/acsaem.1c02293
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发表时间:
2021-10
影响因子:
6.4
通讯作者:
Luo Jun
中科院分区:
文献类型:
--
作者:
Wang Qin;Huang Jiamian;Wang Chenyang;Luo Pengfei;Li Zhili;Liu Rongtao;Ma Qunaying;Luo Jun
NbCoSn-based half-Heusler alloys are promising n-type high-temperature thermoelectric materials, but their relatively high thermal conductivities prevent the further improvement in thermoelectric properties. In this work, an effective way to reduce the lattice thermal conductivity without degradation of electrical transport properties via the isoelectronic substitution of Ta for Nb in NbCoSn-based alloys has been demonstrated. The synthesis and thermoelectric properties of Nb1–xTaxCoSn0.9Sb0.1(x= 0, 0.05, 0.1, 0.15, 0.2, and 0.25) solid solutions are reported. The large mass fluctuation and chemical bond softening caused by Ta alloying significantly suppress the lattice thermal conductivity. Meanwhile, the Ta content has little effect on the carrier mobility due to the close atomic size and similar chemical nature between Ta and Nb. Benefiting from the significant reduction of lattice thermal conductivity and preservation of electrical transport performance after Ta alloying, aZTvalue of ∼0.7 is achieved in Nb0.75Ta0.25CoSn0.9Sb0.1at 973 K, which is about 32% higher than that of a NbCoSn0.9Sb0.1matrix. This work demonstrates a valid approach to enhance the thermoelectric performances of half-Heusler alloys.
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DOI:
10.1088/0022-3727/46/40/405301
发表时间:
2013-10
期刊:
Journal of Physics D: Applied Physics
影响因子:
--
作者:
王建立
通讯作者:
王建立
影响因子:
19
作者:
Jiong Yang;Huanming Li;Ting Wu;Wenqing Zhang;Lidong Chen;Jihui Yang
通讯作者:
Jiong Yang;Huanming Li;Ting Wu;Wenqing Zhang;Lidong Chen;Jihui Yang
影响因子:
16.6
作者:
Hangtian Zhu;Jun Mao;Yuwei Li;Jifeng Sun;Yumei Wang;Qing Zhu;Guannan Li;Qichen Song;Jiawei Zhou;Yuhao Fu;Ran He;Tian Tong;Zihang Liu;Wuyang Ren;Li You;Zhiming Wang;Jun Luo;Andrei Sotnikov;Jiming Bao;Kornelius Nielsch;Gang Chen;David J. Singh;Zhifeng Ren
通讯作者:
Zhifeng Ren
影响因子:
19
作者:
Hanhui Xie;Heng Wang;Y. Pei;C. Fu;Xiao-hua Liu;G. J. Snyder;Xinbing Zhao;T. Zhu
通讯作者:
Hanhui Xie;Heng Wang;Y. Pei;C. Fu;Xiao-hua Liu;G. J. Snyder;Xinbing Zhao;T. Zhu
影响因子:
--
作者:
Toberer, Eric S.;Zevalkink, Alex;Snyder, G. Jeffrey
通讯作者:
Snyder, G. Jeffrey