Abstract:

Electrolytic copper foil, as a key component of the anode material in lithium-ion batteries, directly affects the electrochemical characteristics and safety of the batteries. This article systematically explored the impact of electroplating process parameters and additives on the performance of copper foil, focusing on the effects of copper ion concentration, electrolyte temperature, current density and electrolyte circulation on the grain size, surface roughness and electrochemical performance of the copper foil. Research indicated that appropriate copper ion concentration and electrolyte temperature contributed to achieving uniform and fine grains and a smoother surface, while an increase in current density could enhance the deposition rate and current efficiency to a certain extent. The use of additives played a significant role in refining the grains, improving surface quality and distributing internal stress of the copper foil. The synergistic and competitive effects between different additives required precise control to optimize the performance of the copper foil. Despite the significant progress in the application of electrolytic copper foil in lithium-ion batteries, challenges remained in improving product consistency and performance stability. Future research and development efforts needed to focus on enhancing the production efficiency, product quality and environmental sustainability of electrolytic copper foil, while controlling and reducing production costs.

Key words: electrolytic copper foils, electrodeposition process, additives, microstructure, mechanical properties

摘要：

电解铜箔作为锂离子电池负极材料的重要组成部分，其性能直接关系到电池的电化学特性和安全性。本文系统探讨了电沉积工艺参数和添加剂对铜箔性能的影响，重点分析了铜离子浓度、电解液温度、电流密度和电解液循环等因素对铜箔晶粒尺寸、表面粗糙度和电化学性能的作用。研究表明，适宜的铜离子浓度和电解液温度有助于获得均匀细小的晶粒和更平滑的表面，而电流密度的提高可以在一定程度上提升铜箔的沉积速率和电流效率。添加剂的使用对铜箔的晶粒细化、表面质量和内应力分布具有重要作用，不同添加剂之间的协同和竞争作用需要精细调控以优化铜箔性能。尽管电解铜箔在锂离子电池中的应用已经取得了显著进展，但仍存在提高产品一致性和性能稳定性的挑战。未来的研究和开发工作需要聚焦于提高电解铜箔的生产效率、产品质量以及环境可持续性，同时控制和降低生产成本。

关键词: 电解铜箔, 电沉积工艺, 添加剂, 微观结构, 力学性能