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Preparation of Poly(propylene) Membrane Supported Gel Electrolyte Membranes for Rechargeable Lithium Ion Batteries through Thermal Polymerization of Di(ethylene glycol) Dimethacrylate  

Yun, Mi-Hye (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Kwon, So-Young (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Jung, Yoo-Young (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Cho, Doo-Hyun (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Koo, Ja-Kyung (Department of Applied Chemical Engineering, Korea University of Technology and Education)
Publication Information
Membrane Journal / v.20, no.3, 2010 , pp. 259-266 More about this Journal
Abstract
Porous poly(propylene) supported gel polymer electrolytes (GPE) were synthesized by thermal polymerization of DEGDMA [Di(ethylene glycol) dimethacrylate] in electrolyte solutions (1 M solution of $LiPF_6$ in EC/DEC 1 : 1 mixture) at $70^{\circ}C$. AC impedance spectroscopy and cyclic voltammetry were used to evaluate its ionic conductivity and electrochemical stability window of the GPE membranes. Lithium ion battery (LIB) cells were also fabricated with $LiNi_{0.8}Co_{0.2}O_2$/graphite and GPE membranes via thermal polymerization process. Through the thermal polymerization, self sustaining GPE membranes with sufficient ionic conductivities (over $10^{-3}\;S/cm$) and electrochemical stabilities. The LIB cell with 5% monomer showed the best rate-capability and cycleability.
Keywords
gel polymer electrolyte membrane; lithium ion battery; thermal polymerization; discharge capability; cycleability;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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