分级锂离子电池软包电池以均匀化电流分布并缓解锂沉积
Graded lithium-ion battery pouch cells to homogenise current distributions and mitigate lithium plating
AI总结：
本文提出通过平面内分级电极微观结构来平滑大型锂离子电池软包电池的空间分布，建立并验证了数学模型，推导出最优分级电极解析解，将发生锂沉积的倍率从2.4C提升至4.3C，显著改善了高倍率性能。
摘要：
大型锂离子电池软包电池平面内的电流、温度、荷电状态和降解的空间分布会显著影响其性能，尤其是在高 C 倍率下。本文提出了一种通过在平面内对电极微观结构进行分级来平滑这些空间分布的方法。开发了大型软包电池的数学模型，并根据温度和电压实验数据进行了验证。随后推导出实现软包电池均匀电流分布的最优分级电极的解析解。模型预测，分级电极可显著降低大型软包电池中发生锂沉积的可能性，分级将发生沉积的 C 倍率从 2.4C 提高至 4.3C。这些结果表明，设计空间变化的电极架构具有均匀化大型软包电池响应并改善其高倍率性能的潜力。
英文摘要：
Spatial distributions in current, temperature, state-of-charge and degradation across the plane of large format lithium-ion battery pouch cells can significantly impact their performance, especially at high C-rates. In this paper, a method to smooth out these spatial distributions by grading the electrode microstructure in-the-plane is proposed. A mathematical model of a large format pouch cell is developed and validated against both temperature and voltage experimental data. An analytical solution for the optimal graded electrode that achieves a uniform current distribution across the pouch cell is then derived. The model predicts that the graded electrodes could significantly reduce the likelihood of lithium plating in large format pouch cells, with grading increasing the C-rate at which plating occurs from 2.4C to 4.3C. These results indicate the potential of designing spatially varying electrode architectures to homogenise the response of large format pouch cells and improve their high rate performance.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
