The lead tab serves as a terminal that collects charges generated from each electrode inside the battery and transfers it to the outside of the battery. Among the lead tabs used in the electric vehicle industry, a corrosion of aluminum (Al), chromium-coated Al (CCAl), copper (Cu), and nickel-coated Cu(NCCu) during the cycling of lithium-ion batteries is investigated. Cyclic voltammetry (CV) analysis are performed as part of the electrochemical corrosion test during battery cycle life, scanning electron microscope (SEM) for checking lead tab surface, and X-ray photoelectron spectroscopy (XPS) depth profile for a chemical analysis.

By the CV results, it was inferred that the Cr and Ni coatings form a layer on the surface, and the morphology was visually confirmed by post CV SEM analysis. Subsequent XPS results confirm the sub-reaction related to LiPF₆-carbonate electrolyte. Finally, the composition and distribution of the formed passivation layer were finally confirmed by XPS depth profile analysis. These passivation layers prevent the corrosion of the lead tab and contribute to the extension of battery life by inhibiting the dissolution of Al and Cu metals and the decomposition of the electrolyte during the charge/discharge test of LIB.

引线片用作一个端子，收集电池内部每个电极产生的电荷并将其传输到电池外部。在电动汽车行业使用的铅极片中，研究了锂离子电池循环过程中铝 (Al)、镀铬铝 (CCAl)、铜 (Cu) 和镀镍铜 (NCCu) 的腐蚀情况. 循环伏安法 (CV) 分析作为电池循环寿命期间电化学腐蚀测试的一部分进行，扫描电子显微镜 (SEM) 用于检查铅接头表面，X 射线光电子能谱 (XPS) 深度剖面用于化学分析。

通过 CV 结果推断，Cr 和 Ni 涂层在表面形成了一层，并且通过后 CV SEM 分析目测确认了形态。_{随后的 XPS 结果证实了与 LiPF 6} -碳酸盐电解质相关的子反应。最后，通过XPS深度剖面分析，最终确定了形成的钝化层的组成和分布。这些钝化层可防止铅接头的腐蚀，并通过抑制铝和铜金属的溶解以及 LIB 充电/放电测试期间电解质的分解，有助于延长电池寿命。