超离子Li0.11Cu1.89S化合物的热电特性
Marzhan Kubenova1, Malik Balapanov2, Kairat Kuterbekov1
1L.N. Gumilev Eurasian National University, Astana, Kazakhstan.
Heliyon
|November 7, 2024
概括
这项研究强调了一种新型纳米复合物硫化铜 (Li$_{0.11}$Cu$_{1.89}$S) 的优良热电性能. 该材料获得了很高的优点 (ZT = 1.76),这表明它对热电应用的承诺.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 纳米技术 纳米技术
背景情况:
- 硫化铜是一种多功能材料,在能源转换和储存方面具有应用.
- 它固有的热电性质已经得到了充分的证据.
- 纳米复合材料结构为提高材料性能提供了潜力.
研究的目的:
- 为了研究硫化铜纳米复合材料的热电性能.
- 在含有单临床Cu$_{2}$S和四边形Cu$_{1.96}$S相时分析材料的特性.
主要方法:
- 合成纳米复合材料硫化铜粉.
- 使用扫描电子显微镜 (SEM) 进行表征,以确定粒子大小 (平均373nm).
- 测量电子导电性,西贝克系数和热导电性在一个温度范围内 (300700 K).
主要成果:
- 该Li$_{0.11}$Cu$_{1.89}$S样品的电子导电率为50-180 S/cm,Seebeck系数为0.04-0.31 mV/K.
- 在672K时,达到5.8μW的高功率系数K$^{-2}$cm$^{-1}$.
- 在温度范围内,总热导率从0.61降至0.22 W·K$^{-1}$m$^{-1}$.
- 在672K得到1.76的无维热电功率 (ZT) 值.
结论:
- 合成的Li$_{0.11}$Cu$_{1.89}$S合金表现出卓越的热电性能.
- 它的低导热率和高功率系数使其成为热电器件的非常有前途的材料.
- 对这种纳米复合材料进行进一步的研究是有必要的,以实现实际的热电应用.
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