优化银糊的导电性与控制对流对纳米纹生长的控制对流
Panzhen Li1, Zhe Huang1, Jin Yang1
1State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, Hunan, China.
ACS applied materials & interfaces
|June 17, 2024
概括
研究人员开发了纹银粉,改善了导电银糊的电导性. 这项创新使用较少的白银,为电池中低温应用提供了一种新的方法.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 电化学 电化学 电化学
背景情况:
- 导电的银糊对于电子和太阳能电池中的互连电极至关重要.
- 银糊的性能在很大程度上取决于银粉的制备和烧结.
- 优化银糊需要了解粉末形态及其对导电性的影响.
研究的目的:
- 为了研究流体动力学对银粉制剂的影响.
- 通过先进的表征和模拟,阐明纹银粉的形成机制.
- 为了评估使用纹银粉的银糊的性能提升.
主要方法:
- 在银粉制备过程中进行流体动力学分析.
- 一个X射线衍光仪 (XRD) 的特征.
- 分子动力学 (MD) 模拟.分子动力学 (MD) 模拟.
- 用纹和片银粉进行混合和烧结实验.
主要成果:
- 形成了一种新的纹银粉形态,取代了传统的光滑球形粉末.
- 纹形态促进了线和表面的接触,与点接触相比,提高了导电性.
- 在含有纹粉的银糊中获得了更好的导电性和烧结形态.
- 显著减少的银含量 (66.7%) 足以在250°C下在45分钟内达到高导电性 (9.23 ± 0.68 × 10-6 Ω cm).
结论:
- 流体动力学控制是实现所需的银粉形态的关键.
- 纹银粉在银糊配方中提供了卓越的接触和导电性.
- 这项研究提出了一种新的方法来控制亚微米银粉的形态.
- 这些发现对于开发N型电池的先进低温银具有重要意义.
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