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Enhanced mechanical strength and conductivity of PVFM based membrane and its supporting polymer electrolytes
Author(s) -
Pan Xiaorong,
Lian Fang,
He Yi,
Peng Yifei,
Sun Xiaomeng,
Wen Yan,
Guan Hongyan
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.41839
Subject(s) - materials science , ionic conductivity , membrane , differential scanning calorimetry , electrolyte , cyclic voltammetry , chemical engineering , ultimate tensile strength , polymer , dielectric spectroscopy , conductivity , scanning electron microscope , electrochemistry , polymer chemistry , composite material , electrode , chemistry , biochemistry , engineering , physics , thermodynamics
Polyvinyl formal based polymer electrolyte membranes are prepared via the optimized phase inversion method with poly(ethylene oxide) (PEO) blending. The physical properties of blend membranes and the electrochemical properties of corresponding gel polymer electrolytes (GPEs) are characterized by field emission scanning electron microscopy, X‐ray diffraction, differential scanning calorimetry, mechanical strength test, electrolyte uptake test, AC impedance spectroscopy, cyclic voltammetry, and galvanostatic charge–discharge test. The comparative study shows that the appearance of PEO obviously enhances the tensile strength of membranes and the ionic conductivity of corresponding GPEs. When the weight ratio of PEO is 30%, the tensile strength of membrane achieves 12.81 MPa, and its GPE shows high ionic conductivity of 2.20 × 10 −3 S cm −1 , wide electrochemical stable window of 1.9–5.7 V (vs. Li/Li + ), and good compatibility with LiFePO 4 electrode. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41839.