Preparation of 1-D/3-D structured AgNWs/Bi2Te3 nanocomposites with enhanced thermoelectric properties
Preparation of 1-D/3-D structured AgNWs/Bi2Te3 nanocomposites with enhanced thermoelectric properties
复制标题
具有增强热电性能的 1-D/3-D 结构 AgNWs/Bi2Te3 纳米复合材料的制备
DOI：
10.1016/j.actamat.2014.03.070
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发表时间：
2014-07
期刊：
影响因子：
9.4
通讯作者：
Jiang Wan
中科院分区：
文献类型：
--
作者：
Zhang Qihao;Ai Xin;Wang Weijie;Wang Lianjun;Jiang Wan
通过将一维(1D)银纳米线(AgNWs)引入到三维(3D)Bi2Te3基质中来构建一维/三维结构纳米复合材料，证明了一种新的、简单的方法来显著提高热电性能。详细研究了不同浓度的AgNW对Bi2Te3的形貌和热电性能的影响。结果表明，分散的AgNW有效地抑制了晶粒的长大，并与Bi2Te3形成了新的界面。与纯体Bi2Te3相比，几乎所有的AgNW分散的块体样品都表现出更低的导热系数和更高的功率因数。结果发现，AgNW分散的Bi2Te3纳米复合材料的最大ZT比纯Bi2Te3高出343%。这些结果表明，AgNW的分散会与基质形成新的界面，并引入缺陷，导致长波声子的强烈散射，从而显著降低晶格的热导率。我们的研究证实，在三维热电基质中引入一维纳米分散体是一种有希望显著提高ZT值的方法。
A novel and facile approach is demonstrated to dramatically enhance thermoelectric properties by means of introducing one-dimensional (1-D) silver nanowires (AgNWs) into a three-dimensional (3-D) Bi2Te3matrix in order to construct 1-D/3-D structured nanocomposites. The influence of different concentrations of AgNWs on the morphology and thermoelectric properties of Bi2Te3is investigated in detail. The results show that the dispersed AgNWs effectively suppress grain growth and form new interfaces with the Bi2Te3matrix. In contrast to pure bulk Bi2Te3, almost all bulk samples dispersed with AgNWs exhibit the much lower thermal conductivity and higher power factors. Consequently, the maximumZTof the AgNW-dispersed Bi2Te3nanocomposites is amazingly found to be 343% higher than that of the pure Bi2Te3. These results demonstrated that the dispersion of AgNWs could form new interfaces with the matrix and introduce defects to cause strong scattering of long-wavelength phonons, and therefore significantly reduce the lattice thermal conductivity. Our study confirms that introducing 1-D nanodispersoids into a 3-D thermoelectric matrix is promising approach to improvingZTvalues significantly.
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影响因子：
10.8
作者：
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通讯作者：
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影响因子：
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作者：
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DOI：
--
发表时间：
2008-03
期刊：
Bulletin of the American Physical Society
影响因子：
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作者：
A. Hochbaum;Renkun Chen;R. Delgado;W. Liang;E. Garnett;M. Najarian;A. Majumdar;P. Yang
通讯作者：
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影响因子：
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作者：
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通讯作者：
Leonard, Francois