Cerium filling and doping of cobalt triantimonide

How thermoelectric properties of p-type Tl-filled skutterudites are improved

“…Recent improvements in TE materials have led to many advances, and enhanced ZT values have been reported for several classes of bulk materials, including filled skutterudites. [2][3][4] Skutterudite compounds have the composition MX 3 , where M is a metal atom, such as Co, Rh, or Ir, and X, represents a pnicogen atom such as P, As, or Sb. These compounds crystallize in a body-centered cubic structure (Im3 space group) with 32 atoms in the unit cell.…”

“…These compounds crystallize in a body-centered cubic structure (Im3 space group) with 32 atoms in the unit cell. The unit cell contains two structural cages that can be filled by a variety of guest atoms such as rare earth elements, [4][5][6][7] alkaline earth metals, [8][9][10] alkali metals, 11,12 and group 13 elements. [13][14][15][16][17] When the guest atom denoted by R is incorporated into the cages, the general formula of the compounds, referred to as filled skutterudites, becomes RM 4 × 12 .…”

Effect of Yb Filling on Thermoelectric Properties of Ge-Substituted CoSb<SUB>3</SUB> Skutterudites

“…Acoustic phonon scattering is commonly cited as the dominant scattering mechanism near room temperature in filled and unfilled skutterudites. 1,14,15) We first calculated the reduced Fermi energy from the experimental Seebeck coefficient data using…”

“…[1][2][3][4][5][6][7][8][9][10] have recently attracted great interest as good thermoelectric materials based on the concept of a ''Phonon Glass and Electron Crystal. '' 11) Ybfilled skutterudite compounds are particularly interesting because of the high dimensionless thermoelectric figure of merit ZT close to one at high temperatures [4][5][6][7] as well as the unique physical properties that are associated with heavyfermion or intermediate-valence behavior of the Yb atoms.…”

Synthesis and Thermoelectric Properties of Tin-Filled Skutterudite, SnxCo4Sb12.

“…For example, the filling fraction of Ce in the CoSb3 host lattice is less than 10%.15),16) Substitution of Fe for Co site, i.e., the formation of CeyFe4-xCoxSb12 solid solution, is required to achieve a high Ce filling fraction.15), 16) A high-pressure condition is effective for atom insertion The interatomic distances and bond angles are listed in Table 2. The Sn-Sb distance (>0.336nm) is fairly long as compared with the sum of the bond radii (0.319nm for metallic, 0.281nm for covalent bonds).…”