Electrochemical properties of Li ion polymer battery with gel polymer electrolyte based on polyurethane

Kim, H-S.; Choi, G-Y.; Moon, S-I.; Kim, S-P.
June 2003
Journal of Applied Electrochemistry;Jun2003, Vol. 33 Issue 6, p491
Academic Journal
Gel polymer electrolyte (GPE) was prepared using polyurethane acrylate as polymer host and its performance was evaluated. LiCoO2/GPE/graphite cells were prepared and their electrochemical performance as a function of discharge currents and temperatures was evaluated. The precursor containing a 5 vol % curable mixture had a viscosity of 4.5 mPa s. The ionic conductivity of the GPE at 20 °C was about 4.5 × 10-3 S cm-1. The GPE was stable electrochemically up to a potential of 4.8 V vs Li/Li+. LiCoO2/GPE/graphite cells showed a good high rate and low-temperature performance. The discharge capacity of the cell was stable with charge–discharge cycling.


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