Gel polymer electrolytes (GPE) composed of triethylene glycol diacetate (TEGDA)-2-propenoic acid butyl ester (BA) copolymer and commercial used liquid organic electrolyte are prepared via in situ polymerization. The ionic conductivity of the as-prepared GPE can reach 5.5 x 10(-3) S cm(-1) with 6 wt% monomers and 94 wt% liquid electrolyte at 25 degrees C. Additionally, the temperature dependence of the ionic conductivity is consistent with an Arrhenius temperature behavior in a temperature range of 20-90 degrees C. Furthermore, the electrochemical stability window of the GPE is 5 Vat 25 degrees C. A Li vertical bar GPE vertical bar(Li[Li1/6Ni1/4Mn7/12]O2) cell has been fabricated, which shows good charge discharge properties and stable cycle performance compared to liquid electrolyte under the same test conditions. (C) 2013 Elsevier B.V. All rights reserved.