Optimizing Studies on PVDF-coated PP Separators for Highly Stable Lithium-ion Batteries
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초록
내용
Separators, critical component of batteries, provide electrical insulation between the electrodes to prevent internal short circuits and facilitate the transport of lithium ions. However, commercially used polyolefin-based separators have poor thermal stability and mechanical property. Also, they have inadequate electrolyte wettability, leading to difficulty in applying these commercial separators to next-generation high-energy storage systems. To address these issues, various modifications, such as applying polymer coatings or adding inorganic particles to the separator surface, are commonly introduced. However, unnecessarily thick layer can decrease the lithium ion transport property. Therefore, it is important to define the appropriate thickness that maximizes the benefits of the coating without hindering lithium ion transport. Herein, we investigated the application of a functionalized PVDF coating and identified the optimal point at which self-extinguishing properties reveal, while also enhancing electrochemical performance.