Thermal conductivity of the AxBO2 type layered oxides Na0.77MnO2 and LiCoO2
K. Takahata, I. Terasaki
Abstract
We prepared polycrystalline samples of the AxBO2 type layered oxides Na0.77MnO2 and LiCoO2, and measured thermal conductivity from 15 to 280 K. Na0.77MnO2 shows a low thermal conductivity of 15 mW/cmK, while LiCoO2 shows a much higher value of 40 mW/cmK at 280 K. By comparing them with the data of NaCo2O4, we have found that the low thermal conductivity of AxBO2 comes essentially from the A-ion deficiency, not from the layered structure itself.
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