排放深度 (DOD) 对循环in situ形成的阳极的影响
Kiwoong Lee1, Jeff Sakamoto1,2
1Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA. jeffsaka@umich.edu.
Faraday discussions
|September 25, 2023
概括
在固态电池中循环使用金属阳极是安全和能源的关键. 降低排放深度 (33%) 提高了稳定性,而更高的深度 (66%) 导致因接口问题而导致故障.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属固态电池 (LMSSB) 提供比离子电池更高的安全性和能量密度.
- 金属阳极的无阳极制造可以降低成本.
- 了解in situ形成的阳极的机电化学行为至关重要.
研究的目的:
- 在石榴 LLZO 固体电解质上研究现场形成的 Li 阳极的循环行为.
- 确定放电深度 (DOD) 对阳极循环稳定性的影响.
主要方法:
- 在现场在LLZO固体电解质上形成Li阳极的循环实验.
- 改变排放深度 (DOD) 来评估稳定性.
- 对界面特性和阳极同质性的分析.
主要成果:
- 现场形成的阳极的稳定循环在33%的DOD下实现.
- 观察到不稳定的循环和界面恶化在66%的DOD 3 mA h cm-2 Li.
- 现场形成的阳极的不均性在更高的DOD时被注意到.
结论:
- 排放的深度显著影响在现场形成的阳极的循环稳定性.
- 优化DOD对于防止接口退化和确保LMSSB性能至关重要.
- 机械洞察力指导未来开发稳定的金属阳极用于固态电池.
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