极化界面重组分子的不对称功能化,用于快速和更长时间运行的金属电池
Chae Yeong Son1, Daehyun Kim2, Seo-Young Jun1
1Department of Chemical and Biological Engineering, Sookmyung Women's University, 100 Cheongpa-ro 47-gil, Yongsan-gu, Seoul, 04310, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|August 13, 2024
概括
这项研究引入了3-mercapto-1-propanesulfonic酸盐 (MPS) 作为金属电池 (LMB) 的电解质添加剂. 通过防止树突的生长和改善固体电解质接口层 (SEI),MPS提高了电池的性能和寿命.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 金属电池 (LMB) 提供高能量密度,但面临着树生长和表面反应带来的挑战.
- 这些问题阻碍了LMBs的实际应用和长期稳定性.
研究的目的:
- 开发一种有效的电解质添加剂,用于快速和长期运行的LMB.
- 为了研究3-mercapto-1-propanesulfonic酸盐 (MPS) 的界面重组能力.
主要方法:
- 使用3-mercapto-1-propanesulfonic酸盐 (MPS) 作为一个可极化接口重组分子.
- 在恶劣的条件下 (5 mA cm-2) 测试了带有MPS添加剂的Li-Li对称细胞和LiadV2O5全细胞.
- 分析了MPS对核化,生长和固体电解质界面 (SEI) 层形成的影响.
主要成果:
- 经MPS修改的Li-Li对称细胞实现了超过1200个循环,超过了对称功能化的分子.
- MPS添加剂在 (110) 平面上促进了均的沉积,抑制了树岩的形成.
- 形成了耐用且导电性的SEI层,增强了接口稳定性.
结论:
- 像MPS这样的接口重组分子的不对称功能化对于高性能LMB至关重要.
- MPS有效地控制了核和生长,从而提高了循环稳定性和寿命.
- 这项工作为设计用于先进金属电池的新型电解质添加剂提供了策略.
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