AI 中文总结
本研究通过实验和三维建模，探究高温预处理对COTS LG Chem HG2电池在-20°C低温循环中锂沉积行为的影响，发现不同预处理方案导致锂沉积差异，并揭示其微观机理。
AI 中文摘要
商用现成（COTS）锂离子电池为航天器应用提供了一种有吸引力且可充电的电源。然而，由于这些电池通常设计为在0°C以上充电，具有挑战性的零下温度可能会在飞行操作期间造成不可逆的退化和安全隐患。为了解决这些挑战，本研究探索了影响其低温性能的策略。具体而言，我们研究了COTS LG Chem 18650 HG2电池在-20°C恒电流循环过程中的锂沉积行为，及其对先前高温预处理方案的依赖性，这些方案包括在30°C下进行两周的恒电流循环或存储，以及无预处理的参考情况，即在-20°C下直接循环。实验循环测试揭示了在这些条件下电池之间锂金属沉积的明显差异。为了确定这些差异的起源，我们将电极微结构的计算机断层扫描与三维、空间分辨的电池建模相结合，并分析了模拟结果。
英文摘要
Commercial off-the-shelf~(COTS) Li ion cells offer an attractive and rechargeable power source for spacecraft applications. However, since these cells are typically designed for charging above 0\,\textdegree C, challenging sub-zero temperatures could inflict irreversible degradation and safety hazards during in-flight operation. To address these challenges, this work explores strategies affecting their low-temperature performance. Specifically, we investigate the Li plating behavior of the COTS~LG~Chem~18650~HG2 cell during galvanostatic cycling at $-20\,$\textdegree C and its dependence on prior high-temperature preconditioning protocols, involving either two-week galvanostatic cycling or storage at 30\,\textdegree C, as well as a reference case without preconditioning, i.e., direct cycling at $-20\,$\textdegree C. Experimental cycling tests reveal distinct differences in Li metal deposition between cells subjected to these conditions. To identify the origin of these discrepancies, we combine computed tomography of the electrode microstructure with three-dimensional, spatially resolved cell modeling and analyze the simulation results.
Journal refJournal of Power Sources Advances 40 (2026) 100210
DOI：10.1016/j.powera.2026.100210
