Enhanced thermoelectric properties of iron doped compound (Zn1−xFex)4Sb3

Recent Developments in β‐Zn4Sb3 Based Thermoelectric Compounds

“…In recent years, enhanced power factors through doping optimization are achieved in -Zn 4 Sb 3 . Conventional doping such as the substitutions of Pb [33,34], Bi [35], Nb [36], Mg [37], Cu [38], Cd [39,40], Sn [33,41], In [33,34,42,43], Al [42,44], Ga [42,44], Ag [38,45], Hg [46], Fe [47], Te [48], Journal of Nanomaterials 3 and Se [49] for -Zn 4 Sb 3 have been investigated. As listed in Table 1, the composition, Seebeck coefficient , total thermal conductivity , and maximum reported in some typical literatures are given.…”

Stability and Thermoelectric Properties of Zn4Sb3 with TiO2 Nanoparticle Inclusions

“…While antimony is currently cheap, it should be noted that the European Union considers it a critical raw material because of a high import reliance and mediocre recycling . The optimal performance of β-Zn 4 Sb 3 is in the temperature range 473–673 K, − and this temperature range covers a lot of waste heat generated, for example, in the transportation and industrial sectors. , The performance of thermoelectric materials depends on different physical properties, which are concisely summarized in the thermoelectric figure of merit zT = S 2 T /ρκ, where S is the Seebeck coefficient, ρ is the electrical resistivity, T is the absolute temperature, and κ is the thermal conductivity, where the latter can be separated into contributions from the charge carriers and from the lattice . β-Zn 4 Sb 3 has an excellent zT mainly due to its low thermal conductivity, which can be ascribed to the scattering of phonons by the interstitial Zn atoms in the structure, resulting in a small lattice contribution. − A standing challenge with deploying Zn 4 Sb 3 in applications is the decomposition into ZnSb, Sb, Zn, and at times, ZnO, when exposed to the expected temperatures and thermal gradients used in applications. ,, This has led to a range of studies exploring ways to understand and combat this decomposition. ,− One of these studies investigated the effect of including TiO 2 or ZnO nanocomposites in the β-Zn 4 Sb 3 matrix, and significant improvements were observed in the thermal stability of powders containing TiO 2 nanoparticles, where 98 wt % of β-Zn 4 Sb 3 was intact after heating to 625 K in air compared with ∼30 wt % for pure β-Zn 4 Sb 3 . , The choice of TiO 2 nanoparticles in the present study is based on these results and their easy, cheap, and scalable synthesis with well-controlled size distribution …”

Enhanced thermoelectric performance and high-temperature thermal stability of p-type Ag-doped β-Zn4Sb3

“…The traditional strategy of doping has been widely explored to improve the TE properties by tuning the carrier concentration to optimize the power factor (S 2 σ). Dopants, such as Cd [9], Al [10], Ga [10], In [10,11], Hg [12], Nb [13], Te [14,15], Mg [16,17], Ag [18,19], Cu [18], I [20], Se [21], Fe [22], Bi [23], and Pb [24], have been investigated in β-Zn 4 Sb 3 so far. However, most of the above investigations (including Ag doping) were done below room temperature.…”