通过盐添加剂对固体-和阴极-电解质间相的协同调节,以实现稳定的金属电池
Xianbin Wei1,2,3, Cheng Zhen2,3, Menghao Li2
1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, P. R. China.
Nano letters
|January 17, 2025
概括
二三甲基-4,5-二胺化物 (LiTDI) 添加剂通过增强固体电解质介面 (SEI) 和阴极电解质介面 (CEI) 层来稳定金属电池 (SMB),从而延长周期寿命.
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 (SMB) 在阳极和阴极稳定性方面面临挑战.
- 固体电解质介面 (SEI) 和阴极电解质介面 (CEI) 的同时调节至关重要,但经常被忽视.
- 树的生长和阴极的恶化限制了中小企业的业绩.
研究的目的:
- 为中小企业引入二三甲基-4,5-二胺化 (LiTDI) 作为电解质添加剂.
- 调查LITDI对SEI和CEI形成的影响.
- 提高完整的中小企业的周期寿命和稳定性.
主要方法:
- 使用碳酸盐基电解质与LiTDI添加剂.
- 在室温和高温 (50°C) 进行了长期循环测试.
- 采用冷传输电子显微镜 (Cryo-TEM) 进行接口表征.
主要成果:
- LiTDI添加剂显著延长了完整的中小企业的循环寿命.
- 在8000个循环 (室温) 后,容量保留达到77.8%,在5000个循环 (50°C) 后达到74.3%.
- LiTDI促进无机凝结SEI和CEI,抑制树突和金属溶解.
结论:
- 在中小企业中,LiTDI有效地稳定了阳极和阴极.
- 该添加剂确保了均的涂层,并保护阴极免受降解.
- LiTDI提供了设计功能添加剂的见解,用于下一代电池中的协同SEI/CEI调制.
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