多种方法表征商业26Ah锂离子软包电池的锂沉积
Multi-Method Li Plating Characterization of a Commercial 26 Ah Li-Ion Pouch-Cell
AI总结：
本文通过多种方法表征了商业26Ah锂离子软包电池的锂沉积，结合电化学、显微和光谱技术，验证了锂沉积的存在并评估了不同方法的适用性。
摘要：
锂在石墨上的沉积是锂离子电池的重要退化机制。尽管已使用多种实验技术研究实验室中的锂沉积，但对商业高能量电池的研究往往依赖电化学方法。本文介绍了并分类了用于检测商业A123软包电池上锂沉积的各种方法。在多个电池研究实验室进行的轮换研究中，锂沉积的石墨电极材料使用电化学、显微和光谱方法进行分析，这些方法能够检测金属锂沉积。在电池打开后，使用平板扫描仪检查其在阴极表面的整体分布，以确保样品的可比性。光学和电子显微镜提供了详细的表面信息，并结合聚焦离子束提供了亚表面结构和形貌。光谱方法确认了沉积锂的存在和起始点，灵敏度各异。此外，光谱和成像技术在可能的情况下进行了相关联用。每种技术的可用性和测量持续时间进行了比较。光学方法快速且易于使用，因此推荐用于大多数样品，而光谱确认仅用于参考样品。这种多模式研究展示了可用于单独或联合使用以定性或定量检测锂沉积的一系列方法。
英文摘要：
Lithium (Li) plating on graphite is a significant degradation mechanism in Li-ion batteries. While numerous experimental techniques have been used to study Li plating in laboratory cells, investigations of commercial high-energy cells often rely on electrochemical methods. Here we present and classify various methods for detecting Li plating on a commercial A123 pouch cell. In a round robin study across multiple battery research laboratories, Li-plated graphitic electrode material was analyzed using electrochemical, microscopic, and spectroscopic methods capable of detecting metallic Li deposits. After cell opening, their overall distribution on the anode surface was examined using a flatbed scanner to ensure comparability of the samples. Optical and electron microscopy provided detailed surface and, in combination with a focused ion beam, subsurface structure and morphology. Spectroscopic methods confirmed the presence and onset of plated Li with varying sensitivity. Moreover, spectroscopic and imaging techniques were combined correlatively where possible. Availability and measurement duration of each technique was compared. Optical methods are fast and easy to use; thus, they are recommended for most samples, with spectroscopic confirmation reserved for reference samples. This multimodal study demonstrates a range of methods that can be used alone or in combination to qualitatively or quantitatively detect Li-plating.
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。
