Low thermal conductivity and rapid synthesis of n-type cobalt skutterudite via a hydrothermal method

Abstract

We report low thermal conductivity for n-type cobalt skutterudites synthesized via a rapid hydrothermal procedure combined with evacuated-and-encapsulated heating.

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

“…The density of the samples is in the range of 5.59-5.95 g/cm 3 , which falls in the range of 73-77% of the theoretical density. These values are in relatively good agreement with earlier reports [10,24].…”

“…3. The refined lattice constant is a ¼ 9.052(4) Å, 9.044(2) Å and 9.064 (6) Å for δ¼ 0.00, 0.01 and 0.02, respectively, which is in relatively good agreement with earlier reports (PDF Card: 03-65-3144, a: 9.034(6) Å) [2,21,23,24]. The bulk density was measured by applying the Archimedes principle at room temperature.…”

“…The resistivity of the CoSb 3(1 þ δ) at 350 K is 12 mΩ-cm, 20 mΩ-cm, and 27 mΩ-cm for δ¼ 0.00, 0.01 and 0.02, respectively. δ¼ 0 sample shows the lowest resistivity among the samples, which is lower than those prepared by hydrothermal (6.51 Ω-cm) [24] and polyol synthesis methods (0.38 Ω-cm) [25]. However, Mi et al [13] have reported a resistivity of 3.1 mΩ-cm and 3.6 mΩ-cm at 300 K for CoSb 3 using different consolidation processes.…”

Deposition potential controlled structural and thermoelectric behavior of electrodeposited CoSb3 thin films

“…A unique process termed electrochemical deposition (ED) provides an attractive alternative route in comparison to other techniques [16][17][18][19][20] for the fabrication of high-quality CoSb 3 lms with tailored microstructure and promising thermoelectric properties. The most interesting feature of ED is that, the composition and crystalline structure of the deposited material can be controlled by adjusting the ED parameters such as pH, bath temperature, deposition potential etc.…”

Influence of Nanopores on the Tensile/Compressive Mechanical Behavior of Crystalline CoSb3: A Molecular Dynamics Study

“…The CoSb 3 research focuses on how to decrease the thermal conductivity. [8][9][10] Recent research shows that inserting nanopores into the crystal structure can remarkably reduce the phonon mean free path, hence reducing the lattice thermal conductivity. 11 Nanoporous CoSb 3 material is a promising highperforming thermoelectric material.…”