化工学报 ›› 2023, Vol. 74 ›› Issue (2): 571-584.DOI: 10.11949/0438-1157.20221106

• 综述与专论 • 上一篇    下一篇

锂离子电池硅基负极电解液成膜添加剂的研究进展

程伟江1(), 汪何琦1, 高翔1(), 李娜2, 马赛男3()   

  1. 1.化学工程联合国家重点实验室,浙江大学化学工程与生物工程学院,浙江 杭州 310027
    2.杭州瀛拓科技有限公司,浙江 杭州 311121
    3.浙江大学宁波研究院,浙江 宁波 315100
  • 收稿日期:2022-08-03 修回日期:2022-10-30 出版日期:2023-02-05 发布日期:2023-03-21
  • 通讯作者: 高翔,马赛男
  • 作者简介:程伟江(1999—),男,硕士研究生,weijiangcheng@zju.edu.cn
  • 基金资助:
    国家自然科学基金项目(21875213);浙江省自然科学基金项目(LQ21E020009)

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

Weijiang CHENG1(), Heqi WANG1, Xiang GAO1(), Na LI2, Sainan MA3()   

  1. 1.State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
    2.Hangzhou Yingtuo Technology Co. , Ltd. , Hangzhou 311121, Zhejiang, China
    3.Ningbo Research Institute of Zhejiang University, Ningbo 315100, Zhejiang, China
  • Received:2022-08-03 Revised:2022-10-30 Online:2023-02-05 Published:2023-03-21
  • Contact: Xiang GAO, Sainan MA

摘要:

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。

关键词: 电化学, 电解质, 界面, 锂离子电池, 硅基负极, 成膜添加剂, 协同作用

Abstract:

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.

Key words: electrochemistry, electrolyte, interface, lithium-ion battery, Si-based anode, film-forming additive, synergistic effect

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