Better Together: Integrating Adhesion and Ion Conductivity in Composite Binders for High-Performance Silicon Anodes
발표자
ANJALI NAGAPADI PREMAN (PUSAN NATIONAL UNIVERSITY)
연구책임자
안석균 (PUSAN NATIONAL UNIVERSITY)
초록
내용
The choice of binder plays a critical role in mitigating the severe volume changes of silicon (Si) anodes. Poly(acrylic acid) (PAA) is widely used for its strong adhesion with the Si surface, yet its brittle and non-conductive nature often leads to performance decline over prolonged cycling In this study, we developed a composite binder integrating PAA with a tailored terpolymer comprising (1) Li-ion conducting groups, (2) hydrogen bonding motifs, and (3) covalent crosslinking sites. This combination yields synergistic improvements in electrochemical performance and mechanical integrity of Si anodes, resulting in a high specific capacity of 2026 mAh g ⁻ ¹ and a capacity retention of 71% over 300 cycles, surpassing PAA-based counterparts. The integrated binder system effectively enhances adhesion, mechanical durability, ion-conductivity and electrode morphology, offering a promising strategy for stable and high-capacity Si anodes.