Enhanced thermoelectric properties of NaxCoO2 whisker crystals

Details Enhanced thermoelectric properties of NaxCoO2 whisker crystals Enhanced thermoelectric properties of NaxCoO2 whisker crystals

2003-07-11

arxiv.org/abs/cond-mat/0307277v1

Applied Physics Letters 83, 5416 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures, to appear in Appl. Phys. Lett

Scientific paper

10.1063/1.1634371

Single-crystalline whiskers of thermoelectric cobalt oxide, NaxCoO2, have been grown by an unconventional method from potassium-containing compositions, and their transport properties, and chemical compositions were determined. The growth mechanism was analyzed and interpreted by means of thermogravimetric analysis. At 300 K, electrical resistivity r and thermoelectric power S of the whisker are 102 u ohm cm and 83 uV/K, respectively. The power-factor, S2/r, thus is enhanced up to ~ 68 uW/K2 cm.

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