Giant Seebeck coefficient thermoelectric device of MnO2 powder
Giant Seebeck coefficient thermoelectric device of MnO2 powder
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DOI：
10.1088/0957-4484/23/8/085401
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发表时间：
2012-03
期刊：
影响因子：
3.5
通讯作者：
Fangfang Song;Liming Wu;S. Liang
中科院分区：
文献类型：
--
作者：
Fangfang Song;Liming Wu;S. Liang
报道了一种具有巨大塞贝克系数（S）的热电材料--二氧化锰粉末，并设计了一种实用的二氧化锰热电发生器，用于点亮普通发光二极管（LED）。MnO 2粉末的S测量值高于20000 μV K−1，比最好的TE材料之一Bi 2 Te 3的最新技术水平高出约100倍。巨S很可能与电子态表面密度（DOS）、费米能级密切相关。非常高的S以及因此的高功率因数对于瞬态TE冷却在技术上是重要的。
We report a giant Seebeck coefficient (S) thermoelectric (TE) material—MnO2 powder—and the design of a practical MnO2 TE generator to light up a regular light emitting diode (LED). The S of MnO2 powder was measured to be higher than 20 000 μV K−1, which is about 100 times higher than the state-of-the-art of Bi2Te3, one of the best TE materials. The giant S is very possibly closely related to the surface density of the electronic state (DOS), the Fermi energy level. The very high S and therefore high power factor is technologically important for transient TE cooling.