Kim, Hyunwoo Kim, Jihye Lee, Juho Lee, Minju Kim, Min Kyung Ahn, Seokhoon Kim, Jinsoo Jin, Jungho Kang, Seok Ju 2024-04-04T02:00:33Z 2024-04-04T02:00:33Z 2024-04-04 2024-03 2405-8297 https://pubs.kist.re.kr/handle/201004/149568 Solid polymer electrolytes (SPEs) have emerged as promising alternatives for enhancing the safety features of lithium-ion batteries (LIBs) while remaining compatible with established LIB manufacturing processes. However, a persistent challenge has been the relatively limited yield achieved via traditional fabrication techniques such as solution casting and doctor blade methods. In this study, we present a novel strategy to produce extensive and uniform films of solid polymer electrolytes using a ferroelectric polyvinylidene fluoride-trifluoroethylene (PVDFTrFE) polymer. This approach employs horizontal centrifugal casting (HCC), a technique hitherto unutilized for SPE production. The substantial centrifugal forces generated during the HCC process yield SPE films characterized by uniform thickness across the surface and elevated ionic conductivity at ambient temperature. Compared to conventional solution casting techniques, the Li//Li cell featuring the SPE derived from HCC manifests stable electrochemical performance and increased cycle endurance. Additionally, a full cell incorporating a Li iron phosphate cathode displays consistent electrochemical behavior at room temperature. Notably, a 3 x 4 cm2 pouch cell maintains its performance attributes even under mechanical stress conditions such as folding and punching. These findings underscore the potential effectiveness of employing the HCC method in the development of high-performance SPE-based LIB systems. English Elsevier BV High-performance solid-state Li-ion batteries enabled by homogeneous, large-area ferroelectric PVDF-TrFE solid polymer electrolytes via horizontal centrifugal casting method Article 10.1016/j.ensm.2024.103260 1 Energy Storage Materials, v.67 Energy Storage Materials 67 N scie scopus 001187886200001 2-s2.0-85185199785 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article LITHIUM FILMS CONDUCTIVITY PRESSURE Ferroelectric Horizontal centrifugal casting method Lithium-ion battery PVDF-TrFE Solid polymer electrolyte