Journal
CHEMICAL ENGINEERING SCIENCE
Volume 58, Issue 9, Pages 1715-1720Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0009-2509(03)00025-3
Keywords
gel polymer electrolyte; cell; tetra(ethylene glycol) diacrylate; benzoyl peroxide; lithium-ion polymer battery; advanced lithium-ion battery
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A gel polymer electrolyte (GPE) was prepared using tetra(ethylene glycol) diacrylate monomer, benzoyl peroxide, and 1.0 M LiPF6/EC-DEC (1 : 1 vol%). The LiCoO2/GPE/graphite cells were prepared and their electrochemical properties were evaluated at various current densities and temperatures. The viscosity of the precursor containing the 5 vol% tetra(ethylene glycol) diacrylate monomer was around 4.6 mPa s. The ionic conductivity of the gel polymer electrolyte at 20degreesC was around 5.9 x 10(-3) S cm(-1). The gel polymer electrolyte had good electrochemical stability up to 4.3 V vs. Li/Li+. The capacity of the LiCoO2/GPE/graphite cell at 2.0 C rate was 63% of the discharge capacity at 0.2 C rate. The capacity of the cell at -10degreesC was 81% of the discharge capacity at 20degreesC. Discharge capacity of the cell with gel polymer electrolyte was stable with charge-discharge cycling. (C) 2003 Elsevier Science Ltd. All rights reserved.
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