锂离子电池硅基负极电解液成膜添加剂的研究进展

锂离子电池是能源储存和利用的一项关键技术，能量密度已成为现代电池发展中的一个关键指标。硅基负极由于其较高的理论比容量，得到广泛关注，但硅基材料存在严重的体积膨胀问题。功能性添加剂对电池性能有明显的改善效果，是电解液体系不可缺少的部分，具有“用量小，见效快”的特点，通过成膜添加剂形成稳定的固态电解质界面（SEI）膜进而稳定电极电解液界面，改善硅基负极电池性能。本文总结了近年来硅基负极电解液成膜添加剂的研究进展，对成膜添加剂按照官能团或元素进行分类论述，并对多组分成膜添加剂的协同作用进行了简要阐述。最后，针对目前硅基负极电解液添加剂的研究现状进行了总结，并展望了未来的研究方向。

Research progress on film-forming electrolyte additives for Si-based lithium-ion batteries

Lithium-ion batteries are a key technology for energy storage and utilization. Energy density has become a key indicator in the development of modern batteries. Si-based anodes have received extensive research attention due to their high theoretical specific capacity. But the Si-based materials suffer from serious volume expansion problems. Functional additives are an indispensable part of the electrolyte system which has a significant improvement effect on battery performance, with the characteristics of “small dosage, quick effect”. A stable solid-state electrolyte interface (SEI) film is formed by film-forming additives to stabilize the electrode-electrolyte interface and improve the performance of Si-based anode batteries. This paper summarizes the research progress on film-forming additives for Si-based anodes in recent years. The film-forming additives are discussed in categories according to functional groups or elements, and the synergistic effect of multi-component film-forming additives is briefly described. Finally, the current research status of electrolyte additives for Si-based anodes is summarized and future research directions are prospected.