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arxiv: cond-mat/0307277 · v1 · submitted 2003-07-11 · ❄️ cond-mat.str-el · cond-mat.mtrl-sci

Enhanced thermoelectric properties of NaxCoO2 whisker crystals

classification ❄️ cond-mat.str-el cond-mat.mtrl-sci
keywords thermoelectriccompositionsenhancednaxcoo2propertieswhiskeranalysisanalyzed
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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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