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SU Guang-Yao, LI Zhao-Hui, WANG Xia-Yu, GAO De-Shu. Solid P(VDF-HFP) Electrolyte Plasticized with Ionic Liquid[J]. Chinese Journal of Applied Chemistry,
;2004, 21(9): 900-904.
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A room temperature ionic liquid of 3-ethyl-1-methyl-imidazolium tetrafluoroborate (EMIBF4) was prepared by microwave synthesis, and characterized by elemental analysis and FTIR spectrometry. The solid poly (vinylidene-co-hexafluoropropylene)(P(VDF-HFP)) electrolyte with EMIBF4 as a plasticizer had a decompostion temperature of up to 273℃. The electrochemical stability of the resulting polymer electrolyte was studied on different current collectors (Ni, Al, Cu) by cyclic voltagrammetry. The ionic conductivity of polymer electrolyte[0.5 g P(VDF-HFP)/0.5 g EMIBF4/0.01 g LiBF4] was investigated by ac impedance measurement, and the activation energy of ions transition was 7.27 kJ/mol as calculated according to Arrhenius equation.
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