材料科学
聚合物
电解质
离子电导率
锂(药物)
磷酸铁锂
快离子导体
铸造
电化学
制作
聚偏氟乙烯
化学工程
纳米技术
复合材料
物理化学
电极
医学
替代医学
化学
病理
内分泌学
工程类
作者
Hyunwoo Kim,Jihye Kim,Juho Lee,Minju Lee,Min Kyung Kim,Seokhoon Ahn,Jin‐Soo Kim,Jungho Jin,Seok Ju Kang
标识
DOI:10.1016/j.ensm.2024.103260
摘要
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 (PVDF-TrFE) 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 × 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.
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