Electrical transport and thermoelectric properties of double filled compounds Ca0.1CexCo4Sb12 at low temperatures

Abstract

Electrical transport and thermoelectric properties of double filled compounds Ca0.1CexCo4Sb12 at low temperatures

Low Thermal Conductivity and Enhanced Thermoelectric Performance in In and Lu Double-Filled CoSb3 Skutterudites

“…It is found that j L is the main source of j. Compared with the reference CoSb 3 , 11 In x Lu y Co 4 -Sb 12 compounds show very low j L . Meanwhile, we can see that the double-filled In 0.13 Lu 0.05 Co 4.02 Sb 12 has lower j L than that of the single In-filled In 0.09-Co 4 Sb 12 .…”

“…ZT of filled skutterudites is enhanced overall compared with that of the reference CoSb 3 . 11 The maximum ZT = 0.27 achieved at 365 K for In 0.13 Lu 0.05 Co 4.02 Sb 12 material is about one order of magnitude larger than that of CoSb 3 . The improvement of ZT is mainly attributed to the reduction of j L .…”

“…[7][8][9] As an effective approach, double filling in particular has attracted a great deal of interest thanks to its induced dual-frequency resonant phonon scattering. [10][11][12][13][14][15][16][17] For a possible optimal double filling, indium (In) can be a good option. Among various published works, In single-filled skutterudites were reported to have very good thermoelectric performance.…”

Fast fabrication and enhancement of thermoelectric power factor of p-type nanostructured CoSb3(1+δ) (δ=0.00, 0.01 and 0.02) using solvothermal synthesis and evacuating-and-encapsulating sintering

“…8 shows the relation of ln σ versus T À 1/4 for CoSb 3(1 þ δ) with δ¼ 0.00, 0.01 and 0.02. Earlier researchers also reported that electrical resistivity follows variable-range hopping mechanism for CoSb 3 [25,[30][31][32]. Assuming the transport is dominated by the variable range hopping process, the thermopower can be expressed as follows [33]:…”

High temperature thermoelectric and magnetic properties of InxNdyCo4Sb12 skutterudites

“…Many reports disclose that double filling is an effective method to enhance dual-frequency resonant phonon scattering [12]. Therefore, the double-filled skutterudites exhibit higher thermoelectric performance than the single-filled materials [13][14][15][16][17]. Indium (In) as an effective doping element in CoSb 3 -based skutterudites has attracted much attention.…”