PVdF-HFP와 실리카가 코팅된 실크 견직물의 분리막 특성과 이를 채용한 리튬이온전지의 충방전 특성 = Separator Properties of Silk-Woven Fabrics Coated with PVdF-HFP and Silica and the Charge-Discharge Characteristics of Lithium-ion Batteries Adopting Them

다국어 초록 (Multilingual Abstract)

Mixtures of poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) and silica nanoparticles arecoated on the surface of a silk fabrics separator. The coated separators are finally prepared by injecting an electrolyte solution and then characterized for use of lithium-ion battery separator/electrolyte. In the preparation, various contents of dibutylphthalate (DBP) as a plasticizer are used to enhance the formation of micropores within the coated membrane. The coated silk fabrics separators are characterized in terms of ionic conductivity, drenching rate, and electrochemical stability, and the charge-discharge profiles of lithium-ion batteries adopting the coated separators are also examined. As a result, the coated silk fabrics separator prepared using DBP 40~50 wt% and silica shows the superior separator properties and high-rate capability. This is due to (i) high sustainability of silk fabrics, (ii) the formation of micropores with the coated layer membrane by DBP, (iii) increase in drenching rate by silica nanoparticles to involve great enhance-ments in specific surface area and ionic conductivity.

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