在完全密集的β-Zn4Sb3中调间位,使单脚热电效率翻倍
I-Lun Jen1, Chia-Shien Lin1, Kuang-Kuo Wang2
1Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan.
ACS applied materials & interfaces
|October 30, 2023
概括
将添加到抗氧化物 (Zn4Sb3) 中,可以为热电发电机 (TEG) 创造一个稳定的材料. 这种稳定的Al-Zn4Sb3显示了绿色能源转换的显著提高效率.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 绿色能源 绿色能源
背景情况:
- 抗氧化物 (Zn4Sb3) 是基础的热电材料.
- 它们在热电发电机 (TEG) 中的使用受高温结构不稳定性限制.
研究的目的:
- 为了提高 Zn4Sb3的稳定性和热电性能.
- 调查稀 (Al) 兴奋剂对Zn4Sb3的影响.
主要方法:
- 合成的Al-合的Zn4Sb3 (AlxZn4-xSb3) 具有较低的Al度.
- 具有结构稳定性和热电特性 (zT,转换效率 η).
- 制造和测试的单脚TEG设备.
主要成果:
- 实现了一个高度稳定的Al-Zn4Sb3阶段.
- 与未使用兴奋剂的Zn4Sb3相比,观察到一个更好的峰值值值 (zT).
- 在单脚设备中,在225K的温度差异 (ΔT) 中,证明了3%的转换效率 (η),比原始材料增加了~200%.
结论:
- 用稀释的阴离子兴奋剂有效地稳定了Zn4Sb3.
- 阶段图工程和兴奋剂增强热电性能.
- Zn4Sb3显示了有效和可持续的绿色能源应用的巨大潜力.
相关概念视频
Thermodynamic Potentials
850
Thermodynamic potentials are state functions that are extremely useful in analyzing a thermodynamic system. They have dimensions of energy. The four important thermodynamic potentials are internal energy, enthalpy, Helmholtz free energy, and Gibbs free energy. These thermodynamic potentials can be expressed using two of the following variables: pressure, volume, temperature, and entropy. These two variables are expressed as the rate of change of the thermodynamic potential with respect to other...
850
Thermodynamics: Activity Coefficient
1.5K
Activity is the measure of the effective concentration of the species in solution. It can be expressed as the product of the molar concentration of the species and its activity coefficient. The activity coefficient is a dimensionless quantity and depends on the total ionic strength of the solution.
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...
The activity coefficient is a measure of the deviation from ideal behavior. When the ionic strength of the solution is minimal, the activity coefficient of an ionic species is close to unity, making...
1.5K


