标题： 锂金属电池反应活性的关键参数 显示英文标题

标题： Key Parameters in Determining the Reactivity of Lithium Metal Battery

摘要： 锂（Li）金属阳极对于开发下一代高能量密度电池至关重要。 在商业电池组中大规模应用之前，已经提出了对锂金属潜在安全危害的诸多担忧。 然而，很少有研究系统地评估全电池级别下锂金属阳极的反应性。 在此，采用差示扫描量热法（DSC）结合原位傅里叶变换红外光谱（FTIR）来定量研究锂金属的反应性。 锂化石墨（Li-Gr）和锂化硅（Li-Si）也被作为对比样品进行研究。 系统地研究了在不同电解液组成、形貌和气氛下电镀锂的反应性。 更重要的是，比较了不同正极材料（NMC622、LFP和LNMO）的锂金属全电池的反应性。 发现所有电池组件，包括电解液组成、锂形貌、非活性锂积累的控制和正极稳定性，在控制电镀锂的反应性方面都是至关重要的。 在优化这些条件后，锂金属全电池在400C下没有表现出显著的热反应。 这项工作确定了控制电镀锂反应性的关键参数，并可能有助于未来锂金属电池的设计和制造。 显示英文摘要

摘要： Lithium (Li) metal anodes are essential for developing next-generation high-energy-density batteries. Numerous concerns on the potential safety hazards of the Li metal have been brought up before its massive application in commercialized battery packs. However, few investigations have been performed to systematically evaluate the reactivity of Li metal anode in full cell level. Here, differential scanning calorimetry (DSC) with in situ Fourier-transform infrared spectroscopy (FTIR) are used to quantitatively investigate the Li metal reactivity. Lithiated graphite (Li-Gr) and lithiated silicon (Li-Si) are also studied as the comparison samples. The reactivity of the plated Li when coupled with different electrolyte composition, morphology, and atmosphere is systematically studied. More importantly, the reactivity of Li metal full cell with different cathode materials (NMC622, LFP and LNMO) has been compared. It was found that all cell components, including electrolyte composition, Li morphology, the control of inactive Li accumulation and cathode stability, are essential in controlling the reactivity of the plated Li. After optimizing these conditions, the Li metal full cell shows no significant thermal reaction up to 400C. This work identifies the key parameters in controlling the reactivity of the plated Li and may facilitate lithium metal battery design and manufacturing in the coming future.