外部压力影响树的生长和溶解在金属电池在周期期间的周期
Li Ting Gao1, Yuhang Lyu1, Zhan-Sheng Guo1
1Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, China.
ACS applied materials & interfaces
|December 6, 2023
概括
对金属电池施加外部压力可以抑制树突的生长,但过度的压力会导致骨折. 优化压力是通过控制电来提高金属电池安全性和性能的关键.
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
- 机械工程 机械工程
背景情况:
- 金属阳极对于高能金属电池至关重要.
- 树的生长带来了重大安全风险,阻碍了电池的发展.
研究的目的:
- 研究外部压力和内部压力对树生长和溶解的影响.
- 了解树形成背后的机制及其对电池性能的影响.
主要方法:
- 电化学力学相场模型的开发和应用.
- 分析树形态 (树状与针状) 和死亡的形成.
- 在现场实验观察以验证模型预测.
主要成果:
- 适当的压力减少了树的生长点,并抑制了生长.
- 过度的压力会导致树突骨折,死形成,电池性能降低.
- 树状树状树突产生的死比针状树状树突产生更多.
结论:
- 外部压力可以被战略性地应用,以减轻金属电池中的树增长.
- 平衡外部压力对于防止结构不稳定性和优化电池性能至关重要.
- 研究结果为控制电反应和提高电池安全提供了洞察力.
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