与铜的固态扩散结合用于双金属阳极制造
Javier de Prado1, Børre Tore Børresen2, Victoria Utrilla1,3
1Materials Science and Engineering Area, Escuela Superior de Ciencias Experimentales y Tecnología (ESCET), Rey Juan Carlos University, C/Tulipán s/n, 28933 Móstoles, Madrid, Spain.
Materials (Basel, Switzerland)
|November 9, 2024
概括
扩散粘合成功地将合金与铜连接在一起,用于双金属阳极. 优化条件通过控制金属间层的生长来确保稳定的性能,提高阳极寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 金工业是金工业的一个方面.
背景情况:
- (Al) 阳极对于储能至关重要,但由于体积膨胀而受到降解.
- 连接不相似的金属,如Al和铜 (Cu) 的双金属阳极需要强大的接口.
- 控制金属间化合物形成是保持阳极完整性和性能的关键.
研究的目的:
- 开发和优化一种扩散结合工艺,用于制造Al-Cu双金属阳极.
- 调查粘合参数对接口质量和阳极稳定性的影响.
- 为了评估制造的Al-Cu双金属阳极的电化学性能和可逆性.
主要方法:
- 在不同压力,温度 (450-500°C) 和时间 (5-60分钟) 下,Al合金 (AA1060,AA2024,AA3003) 与Cu的扩散结合.
- 表面准备,包括抛光和化学清洁.
- 使用循环电量计 (CV) 进行电化学表征,以评估间隙/脱间隙可逆性.
主要成果:
- 在低压 (8 MPa) 实现最佳粘合,使用特定的表面处理和每个Al合金的定制粘合参数.
- 扩散结合创造了强大的金属连续性,控制了金属间层的生长.
- 循环电压测量表明,在七个循环中,对间隙/脱间隙反应具有很高的可逆性.
- 合金中的合金元素有助于减少体积膨胀和形成稳定的活性相,增强可逆性.
结论:
- 优化的扩散结合为制造稳定的Al-Cu双金属阳极提供了一种可行的方法.
- 控制的接口形成保持了阳极的活跃体积,并防止了脆化.
- 合金元素通过减轻与体积膨胀相关的降解机制,在改善阳极周期寿命方面发挥着关键作用.
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