底部沉积使得稳定的全固态电池具有超薄金属阳极
Sangyeop Lee1, Sungjin Cho2, Hyunbeen Choi2
1Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, 37673, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|February 16, 2024
概括
这项研究通过稳定金属阳极引入了更安全的全固态电池 (ASSB) 的"底部沉积". 这种方法通过防止短路并改善涂层的均性来提高电池性能和寿命.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 全固态电池 (ASSB) 对于更安全的能量存储至关重要,使用固体电解质和 (Li) 金属阳极.
- 在ASSB中不均的沉积会导致性能降低,内部短路和阻碍电荷传输.
研究的目的:
- 引入和验证一个应用程序.
- 在底部沉积沉积.
- 在ASSB中稳定金属阳极的策略.
- 通过控制沉积,提高ASSB的安全性和电化学性能.
主要方法:
- 开发了一种带有保护层 (聚合物粘合剂和碳黑) 的性电流收集器.
- 实施"底部沉积"概念,用于保护层和电流收集器之间的涂层.
- 电化学循环,扫描电子显微镜 (SEM) 分析,以及在高电流密度 (6 mA·cm-2) 下的性能评估.
主要成果:
- "底部沉积"方法有效地稳定了金属阳极,防止内部短路.
- 功能性粘合剂提供机械强度和粘合力,适应体积变化.
- 观察到均的涂/剥离形态和优良的离子转移特性,即使在高电流密度下也是如此.
- 在ASSB框架中实现了高利用率的增强电化学性能.
结论:
- 使用性电流收集器和保护层的"底部沉积"策略显著改善了ASSB中的金属阳极稳定性.
- 这种方法解决了ASSB性能方面的关键挑战,为更安全,更有效的储能解决方案铺平了道路.
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