Yoon, Juhee Kang, Dong Hyuk Shin, Sangmin Yoo, Suhyoung Kim, Hyemin Lee, Jin-kyun Jin, Hyoung-joon Yun, Young Soo 2025-11-26T10:01:36Z 2025-11-26T10:01:36Z 2025-11-26 2026-03 1616-301X https://pubs.kist.re.kr/handle/201004/153668 Dry-processed ultra-thick cathodes can boost energy density through process innovation alone, but face key challenges from nonuniform additive/binder dispersion and increased ion-transport resistance with thickness. In this study, a reduced graphene oxide (rGO)-based nanocomposite in which polytetrafluoroethylene (PTFE) nanoparticles are anchored onto rGO surfaces is introduced. This PTFE anchoring effectively prevents graphene restacking and enables uniform dispersion throughout the electrode during the solvent-free fabrication process via in situ nanofibrillation of PTFE. By employing this rGO@PTFE nanocomposite as a dual-functional conductive and binding material, we successfully fabricated a high-energy cathode based on high-nickel layered oxide (NCM), achieving a significantly high areal and volumetric capacity of 15.2 mA h cm-2 and 562.9 mA h cm-3, respectively. The incorporation of rGO@PTFE led to improved electrolyte wettability and uptake, as well as enhanced electronic conductivity. More importantly, it raised the lithium-ion transference number to 0.73 and reduced the charge transfer resistance by 62% compared to a conventional reference electrode. Based on these advantages, the rGO@PTFE-based thick cathode (G@P_TC), when paired with a lithium metal anode, enabled the development of a lithium metal battery with an unprecedented high volumetric energy density of 1088 Wh L-1, while maintaining nearly 92% capacity retention over 50 cycles. English John Wiley & Sons Ltd. PTFE-Activated Graphene Overcomes Dispersion Challenges for Scalable Solvent-Free Fabrication of Ultra-Thick, High-Performance Cathodes in Lithium Metal Batteries Article 10.1002/adfm.202522855 1 Advanced Functional Materials, v.36, no.23 Advanced Functional Materials 36 23 Y scie scopus 2-s2.0-105021259600 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Early Access ENERGY nanocomposite reduced graphene oxide solvent-free thick electrode dry-process lithium metal batteries