Tuned thermoelectric properties of TiS1.5Se0.5 through copper intercalation

The solid solution series Tl(V1−xCrx)5Se8: crystal structure, magnetic and thermoelectric properties

“…[1][2][3][4][5][6][7][8] The open framework allows these A cations to be readily ion-exchanged or deintercalated 6 and the low-dimensional nature of the structure leads to many interesting electrical and magnetic properties. [16][17][18][19] Furthermore, a recent initial assessment of the transport properties of TlCr 5 Se 8 has confirmed that this compound, and more generally, this structural type, does exhibit a low lattice thermal conductivity. In fact, the same characteristics present in other transition metal chalcogenides with open layered structures (CdI 2 type) have led to interesting thermoelectric properties with ZT above 0.5 at different temperatures.…”

“…In fact, the same characteristics present in other transition metal chalcogenides with open layered structures (CdI 2 type) have led to interesting thermoelectric properties with ZT above 0.5 at different temperatures. [16][17][18][19] Furthermore, a recent initial assessment of the transport properties of TlCr 5 Se 8 has confirmed that this compound, and more generally, this structural type, does exhibit a low lattice thermal conductivity. Further investigation is required to understand how the thermal and electrical properties depend on chemical and structural factors in these materials.…”

Anisotropic thermoelectric properties of layered compounds in SnX2 (X = S, Se): a promising thermoelectric material

“…For example, The ZT reaches a maximum value of 0.54 at 700 K for Cu 0.05 TiS 1.5 Se 0.5 , the highest value so far observed in layered titanium chalcogenides. 27 However, the best ZT value is only 0.25 for Li-intercalated ZrSe 2 . 61 This journal is © the Owner Societies 2015…”

“…16,[22][23][24] Typical examples include the dichalcogenides MX 2 (M = Mo, W, Ti; X = S, Se, Te), which are good candidates for thermoelectric applications because of their high Seebeck coefficients and low thermal conductivity. 23,25,26 For example, Guilmeau et al 24 reported that TiS 2 exhibits a high power factor value of 1.7 mW m À1 K À2 at 325 K. Most recently, Nunna et al 27 further proposed that the ZT value increases with temperature and reaches a maximum value of 0.54 at 700 K for Cu 0.05 TiS 1.5 Se 0.5 , the highest value so far observed in layered titanium chalcogenides. Naidu et al 28 also interestingly found that WS 2 is an excellent hightemperature thermoelectric material.…”

Modeling the tunable thermal conductivity of intercalated layered materials with three-directional anisotropic phonon dispersion and relaxation times

“…Intercalants have been experimentally added to several layered materials, 1,3,5,13,14,[35][36][37][38][39][40][41][42][43][44][45] most of which exhibit reduced thermal conductivity with some important exceptions. Pawula et al reported that intercalated Fe atoms enhance the cross-plane thermal conductivity of TiS 2 slightly because Fe may create phonon conduction paths instead of phonon scattering sources in the lattice.…”