Self-Assembled Bo@F-rGO Heterostructure for Synergetic LiF-Rich Interphase Stabilization in Lithium Metal Batteries
발표자
박광열 (경북대학교)
연구책임자
유지영 (경북대학교 에너지공학과 교수)
공동저자
박광열 (경북대학교), 유지영 (경북대학교 에너지공학과 교수)
초록
내용
Lithium metal anodes (LMAs) are essential for high-energy-density batteries, but suffer from capacity fading and dendritic growth. To address these, we fabricated a PE separator coated with self-assembled boehmite and fluorine-functionalized rGO (Bo@F-rGO) using 1H, 1H, 2H, 2H-Perfluorooctyltriethoxysilane (PFOES). The self-assembled Bo@F-rGO layer provides a structured framework that induces uniform Li+ flux and enhances mechanical stability.The PFOES modification facilitates the in-situ formation of a LiF-rich SEI, providing high interfacial energy and robustness. Bo@F-rGO suppresses electrolyte decomposition and inhibits dendrite penetration. Electrochemical tests confirmed that the Bo@F-rGO-PE separator significantly reduces nucleation overpotentials and voltage hysteresis. Even at 3C, the system demonstrated extended cycle life and stable plating/stripping, offering a highly effective strategy for stabilizing the lithium metal interface.
This research was supported by the National Research Foundation (NRF) funded by the Korean government (MSIT) (No. RS-2025-00562734) and Basic Science Research Program through National Research Foundation of Korea funded by Ministry of Science and ICT of Korea (No. RS-2025-02217276).