Conductivity and Structural Studies of pol(glycidyl methacrylate(GMA)-Methyl methacrylate(MMA)-Lithium triflate (LiCF3SO3) solid Polymer Electrolyte Films

摘要

The preparation of P(GMA-co-PMMA)-LiTf based solid polymer electrolyte was carried out to study the effect of lithium ions on the room temperature conductivity. The copolymer of (GM-co-MM) was synthesized by photopolymerization method. The films were prepared with different percentage by weight of LiTf. The samples were tested using impedance spectroscopy, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The highest ionic conductivity achieved was 1.2 x 10~(-4) S cm~(-1) for the sample prepared with 30% of LiTf at 393k. The decomposition temperature increases with the increase in the salt content. This thermal property influences the enhancement of the conductivity value. The morphology of the samples shows that the number of pores on polymer system reduces by adding salt. In conclusion, the addition of LiCF3SO3 improves the ionic conductivity of P(GMA-co-MMA)(90/10) solid polymer electrolyte from 1.73 x l0~(-12) S cm~(-1) to 1.4X10~(-6) S cm~(-1) for the sample prepared with of 0 and 30% of LiTf at room temperature, respectively. The conductivity was improved about 6 magnitude after the addition of 30 wt. % LiTf salt to the polymer host.