Poly(methyl methacrylate)/ acid functionalized silica nanocomposite electrolytes for rechargeable lithium batteries

Solid electrolyte based on plasticized poly(methylmethacrylate) and acid functionalized silica were fabricated and evaluated for applicability in secondary lithium batteries. Surface of silica nanoparticles modified using chlorosulfonic acid. Ion conductivity of nanocomposites was improved with increasing filler loading up to 10wt% and then decreased. The maximum conductivity value was about 1.19×10-3 S.cm-1 in comparison with 3.63×10-5 S.cm-1 for pure electrolytes at 25°C. Solid polymeric electrolytes showed higher conductivity at elevated temperatures and reach to 2.91×10-3 S.cm-1 for films composed of 15wt% of functionalized silica at 70°C. It was suggested that improvement of transportation properties could be due to acid-base interaction between sulfone groups of modified silica with salt and polymer. According to the results, plastisized poly(methylmethacrylate) and acid functionalized silica nanocomposite electrolytes, could be considered as high-performance electrolyte for secondary lithium-polymer batteries.

کلیدواژه ها:

Poly(methylmethacrylate) ، Acid functionalized silica ، Lithium batteries