Figure 4. Thermal conductivity measurement of Li_xMoS₂ samples.

(a) Schematics of bulk and thin-film Li_xMoS₂ samples for TDTR measurements. (b) Thermal conductivity of Li_xMoS₂ samples with different degrees of lithiation x. Blue squares: through-plane thermal conductivity of thin-film MoS₂; black squares: through-plane thermal conductivity of bulk MoS₂; black open squares: in-plane thermal conductivity of bulk MoS₂. The minimum thermal conductivity for bulk and thin-film samples are plotted as black and blue dashed lines, respectively. The total uncertainties of the measured thermal conductivity are calculated by taking into account the systematic errors that propagate from uncertainties in the film thickness, laser spot size, and thermal properties of the transducer film and substrate.