Ionic Conductivity Study of PVF-HFP Composite Electrolyte Filled with Al2O3Nanoparticles

Abstract

Abstract: When nanoparticles of Al₂O₃are used to filLIn PVDF-HFP copolymer, the crystallinity of the polymer decreases and amorphous phase content in it increases due to the combination of nanoparticles with polar groupSIn the polymer matrix.As a result, the ionic conductivity of the PVDF-HFPcomposite electrolyte rises up.Aseries of composite polymer membranes(CPM) were prepared with various recipes by means of vacuum evaporation.From those prescriptions the weight proportion, m(Al₂O₃)∶m[plasticizer DBP(dibutyl phthalate)]∶m(PVDF-HFP)=10∶45∶45, is optimal on the basis of testing the bulk resistance of CPM by AC impedance technology.The ionic conductivity of the composite polymer electrolyte reaches 10-3 S/cMAfter impregnating CPM in 1.0mol/L LiPF₆/ EC-DEC(volume ratio 1∶1) liquid electrolyte.Prior to impregnating, the plasticizer DBPwas extracted from CPMwith acetone.

Key words: Polymer electrolyte, Nanoparticle, Ionic conductivity, Lithium ion battery

CLC Number:

O636

TrendMD:

LI Zhao-Hui, SU Guang-Yao, WANG Xia-Yu, GAO De-Shu . Ionic Conductivity Study of PVF-HFP Composite Electrolyte Filled with Al₂O₃Nanoparticles[J]. Chem. J. Chinese Universities, 2003, 24(11): 2065.

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Ionic Conductivity Study of PVF-HFP Composite Electrolyte Filled with Al₂O₃Nanoparticles

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