Kim, Kwang Man Poliquit, Beta Zenia Lee, Young-Gi Won, Jeongha Ko, Jang Myoun Cho, Won Il 2024-01-20T10:30:58Z 2024-01-20T10:30:58Z 2021-09-05 2014-02-20 0013-4686 https://pubs.kist.re.kr/handle/201004/127082 Porous polyethylene (PE) or nonwoven poly(vinylidene fluoride) (PVdF) separator-supported gel polymer electrolytes are realized by thermal polymerization of a precursor solution consisting of poly(ethylene glycol)diacrylate (PEGDA) and an electrolyte solution (1 M LiPF6 in an equal-volume mixture of ethylene carbonate and dimethyl carbonate). The polymerization conditions are optimized to include a PEGDA content of 3 wt.% in the precursor solution and subsequent heat treatment at 80 degrees C for 10 min. Even though the gelled PEGDA electrolyte has a lower ionic conductivity than the electrolyte solution, a LixCoO2/graphite full-cell that has a gel electrolyte with optimized PEGDA content on the PVdF separator achieves a battery performance superior to the one with PE. The best battery performances achieved are a high discharge capacity (116 mAh g(-1)), a good high-rate capability (95 mAh g(-1) at 5.0 C-rate), and a high capacity retention ratio (90%) after the 100th cycle. This enhancement is due to the incorporation of a polar electrolyte solution that is entrapped by the polar PEGDA matrix within the nonwoven PVdF separator, which is a more suitable host that is able to well absorb and preserve the gel electrolyte. (C) 2013 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD ELECTROCHEMICAL CHARACTERIZATION NONWOVEN MATRIX PVDF MEMBRANES PERFORMANCE SYSTEM THIN Enhanced separator properties by thermal curing of poly(ethylene glycol)diacrylate-based gel polymer electrolytes for lithium-ion batteries Article 10.1016/j.electacta.2013.12.077 1 ELECTROCHIMICA ACTA, v.120, pp.159 - 166 ELECTROCHIMICA ACTA 120 159 166 scie scopus 000333778200022 2-s2.0-84892700643 Electrochemistry Electrochemistry Article ELECTROCHEMICAL CHARACTERIZATION NONWOVEN MATRIX PVDF MEMBRANES PERFORMANCE SYSTEM THIN Poly(ethylene glycol)diacrylate thermal polymerization gel polymer electrolytes lithium-ion batteries