Facile synthesis of copper selenides with different stoichiometric compositions and their thermoelectric performance at a low temperature range

Abstract

Copper selenides with different stoichiometric compositions were prepared via facile wet-chemistry methods and sintered-Cu2−xSe exhibited the highest ZT value at a low temperature range.

Fine-Tuning Bi2Te3-Copper Selenide Alloys Enables an Efficient n-Type Thermoelectric Conversion

“…Fabrication of bismuth telluride-copper selenide alloys: Bi 2 Te 3 powders (Macklin, 99.9%) were purchased commercially. The copper selenides with different stoichiometric compositions (CuSe, Cu 3 Se 2 and Cu 2−x Se) were prepared by wet chemical methods, which can be seen in our previous article [ 25 ]. Bi 2 Te 3 and copper selenides powders were mixed in an agate mortar, and then fully ground for about 20 min.…”

“…Similar to bismuth tellurides, copper selenides are another candidate of promising TE materials. It was revealed that the β-phase of Cu 2−x Se exhibits the ideal phonon-glass electron-crystal model, and is also relatively economical and eco-friendly [ 25 , 26 , 27 , 28 ]. More importantly, the very high ZT value, up to 2.3~2.7, of Cu 2 Se-based materials was demonstrated as a characteristic of the p-type TE, due to the optimal carrier concentration and intensive phonon scattering [ 29 , 30 ].…”

Wearable Thermoelectric Generators: Materials, Structures, Fabrications, and Applications

“…Thermoelectric generators (TEGs) are solid-state devices that are made from thermoelectric (TE) materials and can directly realize the conversion between thermal and electrical energy. [9][10][11] Most of the conventional TEGs are rigid, bulky, and heavy, used in applications such as waste heat power generation, refrigeration, and temperature sensing. [12] In recent years, flexible TEGs, which are deformable, light weighted, cost effective, and environmental friendly, have been explored for wearable applications where high deformability and stability are greatly demanded.…”

A facile synthesis of CuSe nanosheets for high-performance sodium-ion hybrid capacitors

“…17,20,21 Copper selenides, anisotropic p-type semiconductor materials, are used in gas sensors, solar cells, and electrochemical energy storage because of their abundance, low cost and high capacity. 16,[22][23][24] Cu 2Àx Se was applied to the anode of SIBs in 2013, and it showed a specic capacity of 120 mA h g À1 aer 100 cycles. 25 To improve the electrochemical performances of copper selenides, downsizing the particle size or compositing with carbonaceous materials could be effective strategies.…”