WSEAS Transactions on Power Systems
Print ISSN: 1109-9445, E-ISSN: 2415-1513
Volume 11, 2016
Enhanced Conductivity and Ion Exchange Capacity of Chitosan Membranes through Modification with Lithium for Lithium Polymer Battery Application
Authors: , , , , ,
Abstract: Modification of chitosan membranes using lithium has been developed. The chitosan membranes were prepared from several deacetylation degree of chitosan. The effect of the deacetylation degree towards an ion conductivity properties of the chitosan membranes, effect of concentration of chitosan-lithium membranes and capability of ionic conductivity as an electrolyte polymer for lithium polymer battery application were studied. The membranes were prepared by the solvent evaporation method. Fourier transform-infrared spectroscopy showed a peak at 1573.8 cm-1 correspond to the ionic interaction between lithium salt with NH2 groups from chitosan. The scanning electron microscopy analysis showed high pore density and rigidity of chitosan membrane microstructure, meanwhile chitosan-lithium membranes have clusters which indicated the deposition of lithium nitrate salt at chitosan polymer chains. The water uptake capacity of the chitosan-lithium membranes was higher than that of the chitosan membrane. The tensile strength analysis showed that the chitosan-lithium membranes was more elastic than the chitosan membranes. Chitosan membrane conductivity and ion exchange capacity are 1.70 x 10-2 S.cm-1 and 2.11 meq.g-1, while the conductivity after adding lithium salt increased to 8.53 x 10-2 S.cm-1 and 3.16 meq.g-1, respectively. The result indicated that modification of chitosan by the addition of lithium salt increased the membrane ionic conductivity and ion exchange capacity values. This solid polymer electrolyte membrane has a potential to be used as a polymer electrolyte in lithium battery.
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Pages: 183-189
WSEAS Transactions on Power Systems, ISSN / E-ISSN: 1109-9445 / 2415-1513, Volume 11, 2016, Art. #22