Kubenova Marzhan, Balapanov Malik, Kuterbekov Kairat, Ishembetov Rais, Almukhametov Rafail, Bekmyrza Kenzhebatyr, Akhmetgaliev Bulat, Sharipov Talgat, Zeleev Marat, Kabyshev Asset, Mukhanova Zhamal, Baikhozhaeva Bakhytkul, Yakshibaev Robert
L.N. Gumilev Eurasian National University, Astana, Kazakhstan.
Ufa University of Science and Technology, Ufa, Russia.
Heliyon. 2024 Oct 19;10(20):e39618. doi: 10.1016/j.heliyon.2024.e39618. eCollection 2024 Oct 30.
Copper sulfide is a multifunctional material. Copper sulfides are known to be used in photo-electric converters, in plasmonics, in active electrodes of batteries and supercapacitors, etc. The excellent thermoelectric properties of copper sulfide are well-known too. The purpose of this study is to investigate the thermoelectric performance of nanocomposite copper sulfide contained monoclinic CuS and tetragonal CuS phase. According to scanning electron microscopy, the average particle size of the synthesized powder was about 373 nm. The LiCuS sample showed an electronic conductivity of 50-180 S/cm, a Seebeck coefficient of 0.04-0.31 mV/K in the range of 300-700 K, and high power factor 5.8 μW Kcm at 672 K. Total thermal conductivity decreases with increasing temperature from 0.61 to 0.22 W∙Km in the range of 300-700 K. Such low thermal conductivity and high power factor made it possible to achieve an extremely high dimensionless thermoelectric figure of merit ZT = 1.76 at 672 K, which allows to consider the LiCuS alloy as a promising thermoelectric material.
硫化铜是一种多功能材料。众所周知，硫化铜可用于光电转换器、等离子体学、电池和超级电容器的活性电极等。硫化铜优异的热电性能也广为人知。本研究的目的是研究包含单斜晶型CuS和四方晶型CuS相的纳米复合硫化铜的热电性能。根据扫描电子显微镜，合成粉末的平均粒径约为373纳米。LiCuS样品在300 - 700 K范围内显示出50 - 180 S/cm的电子电导率、0.04 - 0.31 mV/K的塞贝克系数，在672 K时具有5.8 μW Kcm的高功率因数。在300 - 700 K范围内，总热导率随温度升高从0.61降至0.22 W∙Km。如此低的热导率和高功率因数使得在672 K时能够实现极高的无量纲热电优值ZT = 1.76，这使得LiCuS合金可被视为一种有前景的热电材料。
