Preparations and characterizations of cellulose-based composite polymer electrolytes for lithium-air batteries / Mohamad Fariz Mohamad Taib

In this study, the liquid electrolytes containing different concentration of lithium triflate (LiCFsSOs) salt were prepared. Impedance spectroscopy tecnique was carried out in frequency range between 100Hz to 1MHz .The optimum electrical conductivity obtained was 3.99x 10' Scm"1 at 0.4M of lithium triflate. This conductivity value was calculated using the bulk resistance value which was obtained from the complex impedance plot. Various weight percentage (wt.%) of cellulose acetate were then added into liquid electrolytes (LE) to obtained the polymer gel electrolytes (PGEs).The highest conductivity of PGE was 5.99X 10"3 Scm"1 at 6.0 wt.% of cellulose acetate (CA). Then, various wt.% of Si02 were further added to increase the viscosity of the PGEs. The highest conductivity of CPE was 4.25X 10"3 Scm"1 at 3.0 wt.% of Si02. Finally, the highest conducting CPE sample was then used as an electrolyte in fabrication of lithiumair cell. The discharging capacity of lithium-air battery obtained was 4.25 mAh.