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H. P. Zhang, P. Zhang, M. Sun, H. Q. Wu, Y. P. Wu, Rudolf Holze

A Gelled Polymer Electrolyte with the Blend of PMMA and PVDF of Novel Stick-Like Morphology

Keywords: Lithium Ion Batteries, Gelled Polymer Electrolyte, Polymer Electrolyte Morphology

A novel stick-like polymer based on poly(methyl methacrylate)(PMMA) and poly(vinylidene fluoride) (PVDF) has been prepared. Its physical properties were studied with scanning electronic microscopy (SEM), X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR). Due to the interaction of PVDF with PMMA, the dispersion of PVDF is homogeneous. Its gelled polymer electrolyte (GPE) with 1M LiPF₆/ethylene carbonate (EC)/ethyl methyl carbonate (EMC)/dimethyl carbonate (DMC) (1:1:1) is very stable with an electrochemical window up to 5V vs. Li⁺/Li. The ionic conductivity reaches 0.32mS/cm at ambient temperature. The electrochemical performances of a polymer lithium ion battery consisting of graphite anode, the GPE and LiCo_1/3Ni_1/3Mn_1/3O₂ cathode has been studied, initial results show that this gelled polymer electrolyte is very promising.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 221, 08/2007
Pages: 1039 - 1047

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