Binders for Si based electrodes: Current status, modification strategies and perspective

Silicon based materials have attracted much attention and expectations because of their high energy densities. However, due to the failure behaviors caused by the inherent volume change during cycling and poor conductivity of Si materials, the existing strategies that modify electrode materials have only improved the performance to a certain extent. Binders, which could be functionalized to effectively alleviate the volume expansion, have gradually attract researchers’ attention. Nowadays, the modification of conventional binders and the development of novel multifunctional binders have realized multiple achievements. Thus, we comprehensively summarize all the conventional linear polymer binders, and systematically introduce all the modification methods of linear polymer binders based on the intermolecular interactions and structural design, moreover, the development of novel multifunctional binders, such as conductivity binders, self-healing binders, and biomass binders which are environmentally friendly are demonstrated. Therefore, we hope the summarization of modification strategies and multifunctional binders could be instructive for the design of novel binders, and by developing novel binders we could promote the commercialization of Si-based anodes.