Thermal, mechanical, swelling, and electrochemical properties of poly(vinylidene fluoride)-co-hexafluoropropylene/poly(ethylene glycol) hybrid-type polymer electrolytes

• Published in: Journal of power sources Vol. 124; no. 1; pp. 148 - 154
• Main Authors: Chung, N.K., Kwon, Y.D., Kim, D.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.10.2003; Elsevier Sequoia
• Subjects: Applied sciences; Battery; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrolyte; Exact sciences and technology; Ionic conductivity; Polymer; Secondary lithium; Swelling; Polymer; Secondary lithium; Electrolyte; Swelling; Battery; Ionic conductivity; Temperature dependence; Ethylene glycol; Polymer electrolytes; Pore structure; Mechanical properties; Lithium batteries; Thermal properties; Casting; Pore size; Electrochemical properties
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/S0378-7753(03)00608-6

Porous poly(vinylidene fluoride)-co-hexafluoropropylene/poly(ethylene glycol) (PVDF-HFP/PEG) hybrid-type polymer electrolytes are prepared by partially extracting the PEG molecules during the film-casting process. Thermal, mechanical, swelling, and electrochemical properties of the prepared polymer electrolytes are significantly affected by PEG content, as it changes the structure and size of the pores produced. The ion conductivity is dependent on the amount of electrolyte salt and liquid incorporated. The temperature dependence of ion conductivity is well described by Williams–Lewis–Ferry (WLF) equation. The polymer electrolyte systems are electrochemically stable up to about 5 V.