Synthesis of Porous Cellulose Acetate Separators for Lithium-Ion Batteries Using N-TIPS Technique with Various Solvents
발표자
()
초록
내용
Cellulose-based polymers hold significant potential as lithium-ion battery separators due to their improved wettability and porosity compared to traditional polyolefin separators. Enhancing separator morphology, including wettability and porosity, is key to improving battery efficiency. In this research, we developed porous cellulose acetate (CA) separators using the nonsolvent and thermally induced phase separation (N-TIPS) technique. The process utilized N-methyl-2-pyrrolidone (NMP), DMAc, ethylene glycol, and acetone as solvents, with water serving as the nonsolvent. A cellulose acetate solution was cast onto a glass plate, evaporated at various temperatures, and then immersed in a water coagulation bath to form a flexible membrane. We assessed the morphology, thermal stability, mechanical strength, and electrochemical performance of these CA-based separators and compared them to commercial Celgard membranes.