Design of Self-Healing polymer Binder with Strong Interfacial Interaction and Structural Stability for Advanced Li-Ion Battery
발표자
이해영 (충남대학교)
연구책임자
송우진 (충남대학교)
공동저자
이해영 (충남대학교), 송우진 (충남대학교)
초록
내용
With the rapid growth of EV and ESS markets, achieving high energy density in LIBs has become increasingly important. Silicon is a promising next-generation anode material due to its high theoretical capacity and low operating potential, but severe volume changes during cycling significantly degrade electrode stability. To address this issue, this study develops a high-performance poly(acrylic acid) (PAA)-based binder, termed PAA-APDS, to simultaneously enhance the structural stability and electrochemical performance of silicon anodes. The PAA-APDS binder exhibits self-healing behavior based on reversible disulfide bonds and effectively maintains electrode structural integrity during cycling through multiple hydrogen-bonding interactions and strong intermolecular interactions with the current collector. Consequently, the silicon anode employing the PAA-APDS binder delivers a high reversible capacity of 2262 mAh g⁻¹ with an excellent capacity retention of 95% after 300 cycles.