金属极薄带在锂离子电池中的应用与研究进展

Application and Research Progress of Metal Foils for Lithium-ion Batteries

为响应节能减排号召,新能源成为能源发展的主要研究方向,而锂离子电池作为新能源的一种,被广泛研究和应用。金属极薄带材是锂离子电池中的关键性材料,也是锂离子电池集流体的主要载体材料,将其他活性物质涂敷于金属极薄带上,可作为负极或正极。高品质金属极薄带可以更好地提高锂离子电池的充放电效率,使锂离子电池的性能得到提升。本文综述了铜箔、铝箔、镍箔、不锈钢箔以及表面处理铜箔、铝箔复合集流体在锂离子电池中的研究进展,重点分析了极薄带材的厚度、表面处理及力学性能等对锂离子电池的影响,指出超薄、超延展、高强度的高性能金属极薄带在锂离子电池中的未来发展方向。

In recent years,lithium-ion batteries(LIBs)have attracted significant attention owing to their advantages such as the ability to conserve energy and reduce emission.Metal foil is the key material in LIBs,while current collectors are the main carrier materials as they can be used as negative or positive electrodes by coating other active substances.High-quality metal foil can improve the charging and discharging efficiency of LIBs,thereby enhancing their performance.This review introduces the research progress in copper foil,aluminum foil,nickel foil,stainless-steel foil and surface treated copper foil and aluminum-foil composite-current collectors in LIBs.Particularly,the effects of the thickness,surface treatment,and mechanical properties of the metal foil on the LIBs are analyzed.In addition,we discuss the future development direction of ultra-thin,ultra-ductile,and high-strength,high-performance metal foils in LIBs.