Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai, 200090, China.
State Key Laboratory of Space Power-Sources Technology, Shanghai Institute of Space Power-Sources, 2965# Dongchuan Road, Shanghai, 200245, China.
Small. 2022 Jan;18(1):e2101680. doi: 10.1002/smll.202101680. Epub 2021 Sep 4.
Silicon is considered the most promising candidate for anode material in lithium-ion batteries due to the high theoretical capacity. Unfortunately, the vast volume change and low electric conductivity have limited the application of silicon anodes. In the silicon anode system, the binders are essential for mechanical and conductive integrity. However, there are few reviews to comprehensively introduce binders from the perspective of factors affecting performance and modification methods, which are crucial to the development of binders. In this review, several key factors that have great impact on binders' performance are summarized, including molecular weight, interfacial bonding, and molecular structure. Moreover, some commonly used modification methods for binders are also provided to control these influencing factors and obtain the binders with better performance. Finally, to overcome the existing problems and challenges about binders, several possible development directions of binders are suggested.
硅被认为是锂离子电池阳极材料中最有前途的候选材料，因为其具有高理论容量。然而，巨大的体积变化和低电导率限制了硅阳极的应用。在硅阳极系统中，粘结剂对于机械和导电完整性是必不可少的。然而，几乎没有综述从影响性能的因素和改性方法的角度全面介绍粘结剂，这对粘结剂的发展至关重要。在这篇综述中，总结了几个对粘结剂性能有重大影响的关键因素，包括分子量、界面键合和分子结构。此外，还提供了一些常用的粘结剂改性方法，以控制这些影响因素，获得性能更好的粘结剂。最后，为了克服粘结剂存在的问题和挑战，提出了粘结剂可能的发展方向。
