Abstract
The eco-friendly materials which have not commonly developed as energy storage alternative sources are solid electrolytes. Chitosan is one of the natural polymer potentially used as the material of solid electrolytes. The purpose of this study is to determine the conductivity value of chitosan polymers electrolytes-PVA-glutaraldehyde-NH4Br by varying amount of chitosan and ammonium bromide salt (NH4Br). The polymer electrolyte membrane was made using phase inversion method. Electrolyte polymer is made by mixing chitosan, PVA, glutaraldehyde, and NH4Br to become homogenous liquid and then printed it in petri dish. Polymer electrolyte with chitosan variation of 2; 2.4; 2.8 and 3.2 g has highest ionic conductivity of 1.4983 x 10-2 S/cm with the addition of 2.8 g that can be used as the optimum composition. The variations of salt (NH4Br) were 0; 0.2; 0.4; 0.6; 0.8 and 1 g has the highest ionic conductivity in the point of 2.4385 x 10-2 S/cm with the addition of 0.6 g. The characterization result of FTIR shows OH group at the wavenumber of 3362.02 cm-1, C-O group at 1740.43 cm-1, and C=N group at 1542.41 cm-1. Synthesized polymer can be used as a battery that has 0.43 V voltage.
Highlights
Natural polymer material are widely studied as polymer electrolyte because of their eco-friendly nature
This research is aimed to find the conductivity value of polymer electrolytes from the variation of chitosan added with PVAglutaraldehyde-NH4Br, combined with the addition of ammonium bromide salt (NH4Br)
The polymer electrolyte membrane was prepared by using phase inversion method
Summary
Natural polymer material are widely studied as polymer electrolyte because of their eco-friendly nature. Chitosan is one of the most investigated natural polymer material. Electrolytes consist of liquid and solid electrolytes. The materials which are commonly used as membrane stabilizers are glutaraldehyde and genipin. Both of them are the cross-link agents in chitosan (Jin et al, 2004). Osman et al (2001) stated that the conductivity of chitosan comes from the salt ion movement, this movement can subsequently be fixed with the addition of plasticizer. Several plasticizers which have been used in cross linking of chitosan were oleic acid (Yahya & Arof, 2003), phosphoric acid, PEO (Polyethylene Oxide) (Donoso et al, 2007) and PVA (Polyvinyl Alcohol) (Kumar et al, 2010)
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