Kim, Kwang Man Park, Nam-Gyu Ryu, Kwang Sun Chang, Soon Ho 2024-01-21T02:34:02Z 2024-01-21T02:34:02Z 2021-09-01 2006-08-15 0013-4686 https://pubs.kist.re.kr/handle/201004/135242 Porous poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP)-based polymer membranes filled with various contents of titania (TiO2) nanocrystalline particles are prepared by phase inversion technique and, along with conventional casting method for comparison. N-methyl-2-pyrrolidone (NMP) as a solvent is used to dissolve the polymer and to make the slurry with TiO2. Cast film is obtained by spreading the slurry and evaporating NMP in a dry oven, while phase inversion membrane by promptly immersing the spread slurry into flowing water as a non-solvent. Physical and electrochemical characterizations, such as morphology, thermal and crystalline behavior, and other transport properties of lithium ionic species, are carried out for the polymer films/membranes and the polymer electrolytes with absorbing an electrolyte solution. Phase inversion polymer electrolytes are proved to show superior behaviors in electrochemical properties, such as ionic conductivity, electrochemical and interfacial stability, than cast film electrolytes. This is greatly owed to highly porous structure of phase inversion membranes. Even including the feature of interfacial resistance with lithium electrode, phase inversion polymer electrolytes of PVdF-HFP/(5-20 wt.% TiO2) can be optimized as the adequate ones in applying to the electrolyte medium of lithium rechargeable batteries. (c) 2006 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD NANOCOMPOSITE POLYMER ELECTROLYTES POLY(VINYLIDENE FLUORIDE) LITHIUM BATTERIES IMPEDANCE SPECTROSCOPY CONDUCTION MECHANISMS TIO2 NANOPARTICLES PVDF-HFP GEL CRYSTALLIZATION TRANSPORT Characteristics of PVdF-HFP/TiO2 composite membrane electrolytes prepared by phase inversion and conventional casting methods Article 10.1016/j.electacta.2006.02.038 1 ELECTROCHIMICA ACTA, v.51, no.26, pp.5636 - 5644 ELECTROCHIMICA ACTA 51 26 5636 5644 scie scopus 000240167400009 2-s2.0-33746736257 Electrochemistry Electrochemistry Article NANOCOMPOSITE POLYMER ELECTROLYTES POLY(VINYLIDENE FLUORIDE) LITHIUM BATTERIES IMPEDANCE SPECTROSCOPY CONDUCTION MECHANISMS TIO2 NANOPARTICLES PVDF-HFP GEL CRYSTALLIZATION TRANSPORT polymer electrolytes poly(vinylidene fluoride) titanium oxide nanoparticles phase inversion technique cast films