Preparation of polymer-coated separators using an electron beam irradiation

A polymer-coated polyethylene (PE) separator was prepared by a dip-coating of PVDF-HFP/PEGDMA on both sides of a PE separator followed by an electron beam irradiation. The thermal and electrochemical properties of the polymer-coated PE separator were investigated by using FT-IR, SEM, DSC and an impe...

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Bibliographic Details
Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2008-12, Vol.266 (23), p.4994-5000
Main Authors: Sohn, Joon-Yong, Gwon, Sung-Jin, Choi, Jae-Hak, Shin, Junhwa, Nho, Young-Chang
Format: Article
Language:English
Subjects:
Electron beam irradiation
Lithium secondary battery
Poly(ethylene glycol dimethacrylate)
Poly(vinylidene-co-hexafluoropropylene)
Polymer electrolyte
Polymer-coated separator
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Summary:A polymer-coated polyethylene (PE) separator was prepared by a dip-coating of PVDF-HFP/PEGDMA on both sides of a PE separator followed by an electron beam irradiation. The thermal and electrochemical properties of the polymer-coated PE separator were investigated by using FT-IR, SEM, DSC and an impedance analyzer. The results showed that the coated PVDF-HFP/PEGDMA layer was covalently bound to the PE separator and also crosslinked by an electron beam irradiation. Thermal shrinkage dramatically decreased with an increase in the absorption dose and the PEGDMA content due to the crosslinking of the coated PVDF-HFP/PEGDMA by an irradiation. The PE separator coated with the composition of PVDF-HFP/PEGDMA (9.5/0.5) and irradiated to 150 kGy showed the highest electrolyte uptake of 125% and ionic conductivity of 3.82 × 10 −4 S/cm at room temperature.
ISSN:0168-583X
1872-9584
DOI:10.1016/j.nimb.2008.09.002