Fully Recyclable and Catalyst-Free Poly(β-Amino Ester) Covalent Adaptable Network Solid Polymer Electrolytes for Lithium Metal Batteries
발표자
김채빈 (부산대학교)
연구책임자
김채빈 (부산대학교)
초록
내용
Solid polymer electrolytes (SPEs) offer safer and more durable alternatives to liquid electrolytes but are often limited by poor recyclability due to permanent crosslinks. Here, poly(β-amino ester) (PBAE)–based covalent adaptable networks (CANs) are developed as fully recyclable, catalyst-free, and highly adhesive SPEs. The PBAE CANs exhibit robust mechanical integrity, excellent adhesion, and an ionic conductivity of ~10⁻⁶ S cm⁻¹ at room temperature, which increases by an order of magnitude with plasticizer addition. Notably, temperature-dependent ionic conductivity is closely correlated with dynamic bond exchange behavior, reflecting the role of network mobility in ion transport. Long-term tests show stable operation over 1000 h without short circuits due to effective creep recovery. Full-cell LiFePO₄‖Li tests confirm stable rate performance. Sustainable reprocessing, as well as eco-friendly depolymerization and lithium-salt recovery, are also demonstrated.