Enhanced thermoelectric properties of NaxCoO2 whisker crystals
arXiv:cond-mat/0307277 · doi:10.1063/1.1634371
Abstract
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.
8 pages, 4 figures, to appear in Appl. Phys. Lett