Grain size mediated electrical and thermoelectric performances of mechanically alloyed Sb2Te3 nanoparticles

Evolution of Metal Tellurides for Energy Storage/Conversion: From Synthesis to Applications

“…Additionally, they observed that the average grain size shrank as the milling duration was extended from 5 to 25 h. In a parallel study, Paul et al. [ 94 ] prepared spherical Sb 2 Te 3 nanoparticles by mechanical ball milling utilizing elemental‐Sb and Te‐powders as starting materials, ball milling was performed for 3 h. They concluded that prolonging the milling time yields smaller grain sizes, with dimensions shrinking from 300 to 125.15 nm at milling time 3 and 10 h, respectively. Nguen et al.…”

“…[92] In a study by Zakeri et al, [93] Bi 2 Te 3 nanocrystallites with a thickness of 9-10 nm and flake-like morphology were produced by mechanical ball milling for a period of 25 h. They found that a milling time of at least 5 h was necessary to completely transform the initial Bi and Te powders into the Bi 2 Te 3 phase. Additionally, they observed that the average grain size shrank as the milling duration was extended from 5 to 25 h. In a parallel study, Paul et al [94] prepared spherical Sb 2 Te 3 nanoparticles by mechanical ball milling utilizing elemental-Sb and Figure 6. Schematic illustration of a) synthesis FeTe 2 /rGO Hybrid Microspheres through vapor method, reproduced with permission from Ref.…”

Recent advances of metal telluride anodes for high-performance lithium/sodium–ion batteries

“…For the preparation of MTs nanostructures by MA, a certain stoichiometric ratio of metal and tellurium powders are milled in a hermetical planetary ball mill under Ar atmosphere, and the particles experience repeated cold welding and fracturing owing to the repeated collision and extrusion between high-energy grinding balls, finally resulting in extremely fine microstructures. 97 Zakeri et al 98 first prepared 9–10 nm Bi 2 Te 3 nanocrystallites with flaky morphology by mechanical ball milling for 25 h. They determined that the lowest milling time of 5 h was sufficient for the complete conversion of the starting Bi and Te powders to the Bi 2 Te 3 phase, and the mean grain size decreased with increased milling time from 5 h to 25 h. Paul et al 99 fabricated spherical Sb 2 Te 3 nanoparticles by mechanical ball milling for 3 h using elemental Sb and Te powders as precursors. They found that the longer the milling time, the smaller the grain sizes.…”

Polymer-mixed Sb2Te3/Te nanocomposites exhibiting p-type to n-type conduction reversal and thermal conductivity reduction

“…Polymer-based thermoelectric materials are gaining much attention because of the ability of the polymer in altering the microstructure which can help in tuning the thermoelectric properties [3]. The TE properties of materials, Seebeck coefficient (S), electrical conductivity (σ), and thermal conductivity (κ) are dependent on the quenching medium, i.e., the cooling rate of melt solidification [4][5][6], annealing treatment [7,8], the synthesis process [9,10], and sintering process [11,12]. Knowledge of the phase diagram is important in choosing the appropriate composition and process temperature.…”

“…For room-temperature applications, Sb 2 Te 3 is one of the best p-type thermoelectric materials [12,15]. To improve the TE efficiency of Sb 2 Te 3 several efforts have been made like the formation of nanocomposite [16][17][18][19][20][21][22][23], doping [15], orientation engineering [24], and nanostructuring [25,26].…”