Network polymer electrolytes based on poly(ester diacrylate), ethylene carbonate,and LiClO4

Network polymer electrolytes based on poly(ester diacrylate), LiClO₄, and ethylene carbonate are synthesized and investigated via the methods of electrochemical impedance spectroscopy, DSC, and thermal analysis. It is found that, for the polymer-LiClO₄ system, the conductivity is 4.2 × 10⁻⁷ S/cm at 20°C. With a gradual increase in the amount of ethylene carbonate, the conductivity first decreases and then increases. It is shown that, when poly(ester diacrylate) is crosslinked in ethylene carbonate, up to 45.5% of the latter compound is retained in the polymer and not lost during heating to 100°C. The conductivity of the electrolyte containing 45.6 wt % poly(ester diacrylate), 45.5 wt % ethylene carbonate, 7.5 wt % LiClO₄, and 1.4 wt % benzoyl peroxide achieves 1.9 × 10⁻⁴ S/cm at 20°C.