Song, MK Kim, YT Cho, JY Cho, BW Popov, BN Rhee, HW 2024-01-21T07:40:15Z 2024-01-21T07:40:15Z 2021-09-02 2004-01-02 0378-7753 https://pubs.kist.re.kr/handle/201004/137942 Composite electrolytes composed of a blend of polyethylene glycol diacrylate (PEGDA), poly(vinylidene fluoride) (PVDF) and poly(methyl methacrylate) (PMMA) together with a non-woven fabric have been prepared by means of ultra-violet cross-linking. As the non-woven fabric serves as a mechanical support medium, the composite electrolyte has good integrity up to an initial liquid electrolyte uptake of 1000% (ethylene carbonate (EC)-dimethyl carbonate (DMC)-ethylmethyl carbonate (EMC-LiPF6). The ionic conductivity of the composite electrolytes reaches 4.5 mS cm(-1) at an ambient temperature of around 18degreesC and are electrochemically stable up to about 4.8 V versus Li/Li+. The conductivity and interfacial resistance remain almost constant even at 80degreesC. Scanning electron micrographs show that the high-temperature behavior is associated with structural stability that is induced by chain entanglement between PVdF, PMMA and PEGDA network. A MCMB/LiCoO2 cell using the composite electrolytes retains >97% of its initial discharge capacity after 100 cycles at the C/2 rate (150 mA), and delivers more than 80% of full capacity with an average load voltage of 3.6 V at the 2C rate. The cell also shows much better cycle-life than one with a PVdF-coated composite electrolyte at high temperatures because of the better liquid electrolyte retention capability. (C) 2003 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV LITHIUM-ION BATTERIES GEL ELECTROLYTE MEMBRANES PVDF PERFORMANCE Composite polymer electrolytes reinforced by non-woven fabrics Article 10.1016/S0378-7753(03)00826-7 1 JOURNAL OF POWER SOURCES, v.125, no.1, pp.10 - 16 JOURNAL OF POWER SOURCES 125 1 10 16 scie scopus 000187952300002 2-s2.0-0348223677 Chemistry, Physical Electrochemistry Energy & Fuels Materials Science, Multidisciplinary Chemistry Electrochemistry Energy & Fuels Materials Science Article LITHIUM-ION BATTERIES GEL ELECTROLYTE MEMBRANES PVDF PERFORMANCE lithium-ion polymer battery polyethylene glycol diacrylate non-woven fabric composite electrolyte ultra-violet curing