Successful integration of metallic lithium anodes into secondary batteries could enhance energy density and enable new forms of electrified transportation. However, the outlook for widespread lithium metal adoption in energy storage devices remains mixed. This comes in part from existing gaps in our understanding of the relationships connecting the initial state of lithium, its evolution with cycling, and end-of-life state. It remains important to develop standardized protocols for material and cell characterization, cycling performance, safety, and recycling procedures for lithium metal-based batteries. In February 2023 a cohort of scientists and engineers from academia, national laboratories, and industry gathered to converge on a list of critical challenges and action items to provide better understanding of lithium metal evolution and to enhance academic, governmental, and industrial partnerships to address these challenges. Here, we highlight the major discussion topics revolving around the manufacturing of lithium metal, its related metrology and integration into battery form factors, and best practices testing its electrochemical performance relevant to automotive applications. We introduce a power-controlled discharge testing protocol for research and development cells, in alignment between major automotive stakeholders, that may reveal lithium metal battery dynamics closer to practical driving behavior.

将金属锂阳极成功集成到二次电池中可以提高能量密度并实现新形式的电气化运输。然而，锂金属在储能设备中广泛采用的前景仍然喜忧参半。这部分是由于我们对锂的初始状态、其与循环的演变以及寿命终止状态之间的关系的理解存在差距。为锂金属电池的材料和电池表征、循环性能、安全性和回收程序制定标准化协议仍然很重要。 2023 年 2 月，一群来自学术界、国家实验室和工业界的科学家和工程师齐聚一堂，讨论了一系列关键挑战和行动项目，以更好地了解锂金属的演化，并加强学术界、政府和工业界的合作伙伴关系，以解决这些问题。挑战。在这里，我们重点介绍围绕锂金属制造、其相关计量和与电池外形尺寸的集成以及测试其与汽车应用相关的电化学性能的最佳实践的主要讨论主题。我们为研发电池引入了一种功率控制放电测试协议，与主要汽车利益相关者保持一致，这可能会揭示更接近实际驾驶行为的锂金属电池动态。