Characteristics of Interpenetrated Polymer Network System made of Polyethylene Oxide-LiBF4 Complex and Polystyrene as the Electrolyte for Lithium Secondary Battery

Toshiyuki MOMMA; Hiroaki ITO; Hiroki NARA; Hitomi MUKAIBO; Stefano PASSERINI; Tetsuya OSAKA

doi:10.5796/electrochemistry.71.1182

Articles

Characteristics of Interpenetrated Polymer Network System made of Polyethylene Oxide-LiBF₄ Complex and Polystyrene as the Electrolyte for Lithium Secondary Battery

Toshiyuki MOMMA, Hiroaki ITO, Hiroki NARA, Hitomi MUKAIBO, Stefano PASSERINI, Tetsuya OSAKA

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Keywords: PEO-LiBF₄, Interpenetrated Polymer Network, Co-continuous, Polymer Blend, Gel Polymer Electrolyte, Lithium Battery

JOURNAL FREE ACCESS

2003 Volume 71 Issue 12 Pages 1182-1186

DOI https://doi.org/10.5796/electrochemistry.71.1182

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Abstract

We propose a polymer blending method for preparing the PEO (polyethylene oxide)-LiBF₄ complex electrolyte for lithium secondary battery applying to the IPN (interpenetrated polymer network) gel electrolyte. The polymer blend mixture of PEO-PS (polystyrene)-LiBF₄ was prepared as a film by the hot-pressing method. The resulting IPN film was plasticized with the electrolyte solution of 0.5 M LiBF₄/EC (ethylene carbonate)-PC (propylene carbonate) (1 : 1 vol.), in which the formation of PEO-LiBF₄ complex was confirmed by the Raman spectroscopy. The basic properties as an electrolyte of Ii metal batteries, i.e., ionic conductivity, chemical stability at the polymer gel electrolyte/lithium metal interface, and charge-discharge performance of the Li/(PEO-LiBF₄/PS) gel electrolyte/LiCoO₂ cell were studied and discussed.

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