Enhanced thermoelectric properties of neodymium intercalated compounds NdxTiS2

The thermoelectric properties of Nd-intercalated compounds NdxTiS2 have been investigated at the temperatures from 5 to 310 K. The results indicate that Nd-intercalation into TiS2 leads to substantial decrease of both DC electrical resistivity (141%, 314% and 728% lower at 300 K for x=0.025x=0.025, 0.05 and 0.15, respectively) and lattice thermal conductivity (35%, 72% and 93% lower at 300 K for x=0.025x=0.025, 0.05 and 0.15, respectively) as compared to those of pristine TiS2. Specially, the figure of merit, ZT, of lightly intercalated compound Nd0.025TiS2 has been improved at all temperature investigated, and specifically it reaches 0.027 at 300 K, which is about 59% greater than that of TiS2.