Korean Journal of Chemical Engineering, Vol.22, No.2, 234-237, March, 2005
New Method for the Preparation of Solid Polymer Electrolyte Based on Poly(vinylidene fluoride-co-hexafluoropropylene)
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A novel solid polymer electrolyte (pore-gel SPE) has been found to provide superior SPE having a high conductivity, good mechanical strength and low solution leakage. This pore-gel SPE was prepared from gelation in pores of polymer membrane with electrolyte solution including solvent. The conductivity of pore-gel type PVDF-HFP/TEABF4 (Tetraethylammomium tetrafluoroborate) membrane can reach 1.6×10.1 Scm.1. The tensile strength of this membrane was 4,000 kPa, which is about 23 times larger than that of gel-type SPE with the same composition. Poregel SPE reduced solution leakage to 0%, compared with 2% of hybrid-type SPE after 2.0 hr leakage test in PVDFHFP/TEABF4 membrane.
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