Entropy engineering promotes thermoelectric performance in p-type chalcogenides.
Entropy engineering promotes thermoelectric performance in p-type chalcogenides.
复制标题
熵工程提升 p 型硫属化物的热电性能
DOI:
10.1038/s41467-021-23569-z
复制
发表时间:
2021-05-28
影响因子:
16.6
通讯作者:
He J
中科院分区:
文献类型:
--
作者:
Jiang B;Yu Y;Chen H;Cui J;Liu X;Xie L;He J
We demonstrate that the thermoelectric properties of p-type chalcogenides can be effectively improved by band convergence and hierarchical structure based on a high-entropy-stabilized matrix. The band convergence is due to the decreased light and heavy band energy offsets by alloying Cd for an enhanced Seebeck coefficient and electric transport property. Moreover, the hierarchical structure manipulated by entropy engineering introduces all-scale scattering sources for heat-carrying phonons resulting in a very low lattice thermal conductivity. Consequently, a peak zT of 2.0 at 900 K for p-type chalcogenides and a high experimental conversion efficiency of 12% at ΔT = 506 K for the fabricated segmented modules are achieved. This work provides an entropy strategy to form all-scale hierarchical structures employing high-entropy-stabilized matrix. This work will promote real applications of low-cost thermoelectric materials. The synergism of entropy engineering and the typical optimization mechanisms in high-entropy-stabilized chalcogenide is unknown. Here, the authors find high-entropy-stabilized composition works as a promising matrix of applying synergistic effect to realize high thermoelectric performance.
登录
查看更多内容
影响因子:
64.8
作者:
Biswas, Kanishka;He, Jiaqing;Kanatzidis, Mercouri G.
通讯作者:
Kanatzidis, Mercouri G.
影响因子:
29.4
作者:
Maier, Stefan;Steinberg, Simon;Wuttig, Matthias
通讯作者:
Wuttig, Matthias
影响因子:
29.4
作者:
Liu, Ruiheng;Chen, Hongyi;Chen, Lidong
通讯作者:
Chen, Lidong
影响因子:
16.6
作者:
Fu C;Bai S;Liu Y;Tang Y;Chen L;Zhao X;Zhu T
通讯作者:
Zhu T
影响因子:
39.8
作者:
Jood, Priyanka;Ohta, Michihiro;Kanatzidis, Mercouri G.
通讯作者:
Kanatzidis, Mercouri G.