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http://dx.doi.org/10.5229/JKES.2003.6.2.098

Synthesis of Cross-Linked Polyurethane-Based Gel Polymer Electrolyte and Its Electrochemical Properties  

Kim, Hyun-Soo (Korea Electrotechnology Research Institute)
Kim, Sung-Il (Korea Electrotechnology Research Institute)
Choi, Gwan-Young (Korea Electrotechnology Research Institute)
Moon, Seong-In (Korea Electrotechnology Research Institute)
Yun, Mun-Soo (Korea Electrotechnology Research Institute)
Kim, Sang-Pil (Saehan Enertech Co.,)
Publication Information
Journal of the Korean Electrochemical Society / v.6, no.2, 2003 , pp. 98-102 More about this Journal
Abstract
Urethane acrylate oligomer was synthesized and used in a gel polymer electrolyte (GPE) and then its electrochemical performances were evaluated. $LiCoO_2/GPE/graphite$ cells were prepared and their performances depending on discharge currents and temperatures were evaluated. The precursor containing $5 vol\%$ curable mixture had a low viscosity relatively. ionic conductivity of the gel polymer electrolyte at room temperature and $-20^{\circ}C$ was ca. $5.9\times10^{-3}S{\cdot}cm^{-1}\;and\;1.4times10^{-3}S{\cdot}cm^{-1}$, respectively. GPE showed good electrochemical stability up to potential of 4.5V vs. RLi/Li^+.\;LiCoO_2/GPE/graphite$ cell showed a good high-rate and low-temperature performance.
Keywords
Polyurethane acrylate; Lithium ion battery; Gel polymer electrolyte; Curable mixture; Ionic conductivity;
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