Toughened Poly(Acrylic Acid)-based Interconnected Network Binder for High-Performance Silicon Anodes
발표자
()
초록
내용
Poly(acrylic acid) (PAA) has been recognized as a potential binder for silicon (Si)-based Li-ion batteries owing to the strong interaction of carboxylic acids with the Si surface. For Si anodes, the desired binders should provide strong adhesion and effectively dissipate mechanical stress during repeated volume change. However, the linear and stiff nature of PAA is inadequate for mitigating volume-induced stresses of Si anodes over prolonged cycles. To address this challenge, we synthesized interconnected network (ICN) binders consisting of linear PAA and poly(beta-amino ester) with multiple hydroxyl groups. Comparison of the linear PAA and ICN binders reveals that the ICN structure enhances the mechanical toughness and cycling stability of the Si anodes. Additionally, through an in-depth analysis of various physical properties of the binder and their correlation with battery performance, we identified physical parameters that is most significant for achieving high performance Si anodes.