Fabrication of a novel sandwich-like composite separator with enhanced physical and electrochemical performances for lithium-ion battery

作者: Dazhao Wu , Jinlin He , Mingzu Zhang , Peihong Ni , Xiaofei Li

DOI: 10.1016/J.JPOWSOUR.2015.04.182

关键词:

摘要: In this work, two kinds of composite separators are prepared and used for lithium-ion batteries, which a PP nonwoven/PVdF-HFP/PMMA blending-type separator (CS) sandwich-like nonwoven/PVdF-HFP with the introduction PMMA nanoparticles on surface (nano-CS). The morphology, electrolyte uptake, ionic conductivity electrochemical properties studied by SEM analysis, impedance measurements, charge–discharge cycle C-rate tests, respectively. nano-CS CS(0.2) exhibit similar in uptake (212% 202%, respectively) porosity (77.9% 75.3%, respectively). Nonetheless, shows enhanced thermal stability higher compared commercial separators. Meanwhile, LiFePO4/Li half-cell assembled displays best capacity cyclability especially at high discharge current rate, indicating that is kind promising candidate high-performance batteries.

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