Facile Fabrication of High-Performance Separators via Polymerization-Induced Phase Separation for Lithium Metal Batteries
발표자
김호리 (서울대학교)
연구책임자
오준학 (서울대학교)
초록
내용
To leverage the advantages of lithium metal batteries, separator properties such as wettability and thermal stability are critical. Here, a porous separator was fabricated via a simple polymerization-induced phase separation (PIPS) method. The PIPS separator showed improved cycling stability over commercial PE, maintaining performance under 2C cycling at 3.0–4.3 V in Li/NCM811 cells and 0.5 mA cm⁻², 0.5 mAh cm⁻² in symmetric Li/Li cells. This was attributed to enhanced electrolyte uptake and wettability. It also mitigated capacity fading under 1C cycling at 60 °C, demonstrating thermal durability. Structural and compositional analyses—including SEM, CLSM, XPS, TOF-SIMS, and BET—were conducted with electrochemical tests. These results demonstrate that the PIPS-based separator offers a simple, scalable, and effective approach to improving the safety and performance of lithium metal batteries.