Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
Volume 266, Issue 23, Pages 4994-5000Publisher
ELSEVIER
DOI: 10.1016/j.nimb.2008.09.002
Keywords
Polymer-coated separator; Polymer electrolyte; Electron beam irradiation; Poly(vinylidene-co-hexafluoropropylene); Poly(ethylene glycol dimethacrylate); Lithium secondary battery
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Funding
- Ministry of Education, Science and Technology, Korea
- National Research Foundation of Korea [2007-00078] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 x 10(-4) S/cm at room temperature. (C) 2008 Elsevier B.V. All rights reserved.
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