$SiO_2$ ] Effect on the Electrochemical Properties of Polymeric Gel Electrolytes Reinforced with Glass Fiber Cloth

Abstract

[ ] effect on the electrochemical properties of polymeric gel electrolytes(PGEs) reinforced with glass fiber cloth(GFC) was investigated . PGEs were composed of polyacrylronitrile(PAN), poly(vinylidenefluoride-co-hexafluoropropylene) (P(VdF-co-HFP)), and three kind of plasticizer(ethylene carbonate, dietyl carbonate, propylene carbonate). was added to PGEs in the weight fraction of 10, 20, respectively. PGEs containing showed conductivity of over and electrochemical stability window to 4.8V. In the impedance spectra of the cells, which were constructed by lithium metals as electrodes, interfacial resistance increased due to growth of passivation layer during storage time and remarkable difference was not observed with content of . In the impedance spectra of the lithium ion polymer batteries consisted of and mesophase pitch-based carbon fiber(MCF), ohmic cell resistance of PGE was changed continuously with number of cycle, but those of PGEs were not. Discharge capacity of the PGE containing showed 132 mAh/g at 0.2C rate and of discharge capacity was retained at 2C rate.