Gellan Gum-LiI Gel Polymer Electrolytes

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°C and exhibit ionic conductivity of 3.8 × 10 −4 S/cm at room temperature for the sample doped with 40 wt% of LiI. Add...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2012-03, Vol.554 (1), p.232-238
Main Authors: Halim, N. F. A., Majid, S. R., Arof, A. K., Kajzar, F., Pawlicka, A.
Format: Article
Language:English
Subjects:
Conductivity
Crystals
Electric properties
Electrical properties
Electrolytes
Gellan gum
Glycerols
Iodides
ionic conducting membranes
Ionic conductivity
Liquid crystals
Lithium
polymer electrolyte
Polymers
Temperature
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Summary: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°C and exhibit ionic conductivity of 3.8 × 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 × 10 −3 S/cm, which remains stable up to 100°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°C.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2012.634344