Gellan gum-liI gel polymer electrolytes

• Main Authors: Halim, N.F.A., Majid, Siti Rohana, Arof, Abdul Kariem, Kajzar, F., Pawlicka, A.
• Format: Article
• Published: Taylor & Francis 2012
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/7694/; https://doi.org/10.1080/15421406.2012.634344
• Institution: Universiti Malaya

Gellan-based polymer electrolytes (PEs), doped with lithium iodide (LiI), were prepared and their electrical properties were characterized. The samples are thermally stable up to 234 degrees C and exhibit ionic conductivity of 3.8 x 10(-4) S/cm at room temperature for the sample doped with 40 wt% of LiI. Addition of 10 wt% of glycerol promotes an increase of the ionic conductivity to 1.5 x 10(-3) S/cm, which remains stable up to 100 degrees C. The activation energies of 2.4 to 12.4 kJ/mol were derived from the Arrhenius model. The repeated ionic conductivity measurements as a function of temperature show that these membranes can be reversibly used between the room temperature and 100 degrees C.