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在金属电池中压力驱动的胡须形成

Martin Werres^1,2, Dariusz Niedziela³, Arnulf Latz^1,2,4

¹Institute of Engineering Thermodynamics, German Aerospace Center (DLR), Wilhelm-Runge-Str. 10, 89081 Ulm, Germany.

|July 14, 2025

概括

金属电池的胡须是由于通过固体电解质相间裂的应力驱动挤出而形成的. 避免固体电解质间相裂纹是防止胡须形成和提高电池效率的关键.

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
计算机建模计算建模

背景情况:

金属电池为下一代应用提供高能量密度.
在电过程中形成胡须会降低库伦比效率.
胡子生长的确切机制尚不清楚.

研究的目的:

通过计算来研究胡须形成的机制.
为了解释胡须观察到的根生长.
为了确定在金属电池中防止胡须形成的策略.

主要方法:

模拟挤出作为功率定律的赫歇尔-布克利流体.
使用的实验动力定律爬行数据对模型进行参数化.
分析固体电解质间相 (SEI) 破裂与自我愈合的作用.

主要成果:

通过SEI裂的压力驱动的挤出机制解释了胡须根的生长.
该模型复制了胡须的特征单维形状.
SEI裂,而不是自我愈合,决定了胡须的出现.

结论:

SEI裂变是胡须形成的主要驱动因素.
防止SEI破解提供了一个直接的策略,以避免胡须.
这为提高金属电池性能提供了一个简单的指导方针.

关键词:

美国海军突击队.流体动力学流体动力学金属电池是金属电池的一种.的胡须是的胡须模拟模拟是指一个模拟模拟.

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