双功能合金酸盐添加剂稳定快充金属电池
Austin G Paul-Orecchio1, Lucas Stockton2, Neel Barichello2
1Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.
ACS applied materials & interfaces
|July 17, 2024
概括
这项研究稳定了金属阳极,以使用双重功能M-酸盐添加剂更快地充电. 这些添加剂促进密集的涂层和增强离子扩散,使先进的金属电池能够稳定循环.
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:
- 金属阳极为离子电池提供高容量,但会受到石形成的影响,阻碍快速充电并导致电池故障.
- 稳定金属和剥离对于开发下一代高能量密度电池至关重要.
研究的目的:
- 研究使用双功能合金M-酸盐添加剂 (M:Ag,Bi,Ga,In,Zn) 来稳定快速充电金属涂层/脱落.
- 为了提高金属阳极的电化学性能和循环寿命.
主要方法:
- 使用M-酸盐添加剂,形成性合金,用于密集的核化.
- 使用酸盐来制造具有离子导电性和机械稳定的Li3N和LiNO3被动化层.
- 进行电化学循环测试,用于基酸对称电池和基酸完全电池.
主要成果:
- M-酸盐添加剂有助于均的沉积和剥离.
- 保护Zn的细胞在750个周期以2.0 mA cm-2和140个周期以10.0 mA cm-2的速度在Li的对称性测试中实现.
- 保护Zn的Lithium Iron Phosphate全细胞在C/2.2的400个循环后保持了89.2%的容量.
结论:
- 双功能的M-酸盐添加剂有效地稳定了快速充电的金属涂层/脱落.
- 开发的被动化层增强了离子扩散和机械稳定性,提高了电池性能和周期寿命.
- 这种方法为推进快充金属电池技术提供了一个有前途的战略.
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