The Effect of Ammonium Chloride Concentration in Biopolymer Carrageenan Films as Organic Battery Electrolyte V K Sari (a*), Anisah (a), M A F Turnip (b), M Y P Akbar (b), P Wulandari (b), Paula S Rudati (b)
a) Physics of Magnetism and Photonic Research Division, FMIPA, Bandung Institute of Technology
Jalan Ganesha 10, Bandung 40132, Indonesia
*24722006[at]mahasiswa.itb.ac.id
b) Department of Electrical Engineering, Politeknik Negeri Bandung
Jl. Gegerkalong Hilir, Bandung Barat 40559, Indonesia
Abstract
Bio-based polymers have attracted research interest due to interesting characteristics such as flexibility, low-cost material and it is easy to prepare in a large area film. Commonly biopolymers based on polysaccharides are chitosan, cellulose, starch, and carrageenan. In this study, we attempt to optimize and analyse the effect of ammonium chloride (NH4Cl) addition into κ--carrageenan as electrolyte regarding to the performance of organic battery electrolyte. We used various concentrations of NH4Cl into kappa carrageenan solution to form thin films and investigate its chemical, mechanical and electric properties. The results show the morphology of mixed kappa carrageenan and NH4Cl with concentration of 0.45 g is a smoother than that of a pristine κ--carrageenan. FTIR spectra shows there are no significant chemical interaction between kappa carrageenan and NH4Cl even though for the symmetric stretching of O-S-O from kappa carrageenan shifted to low frequency after addition of NH4Cl We found that the incorporation of NH4Cl increase the film flexibility with the elongation is about 4 mm and it enhance the film conductivity about 1.02 x 10-6 S/m. Based on our investigation, the kappa carrageenan with NH4Cl can be apply for device application, since it is successful to produce a battery performance by charging process with charging voltage is 4.6 V with the lifetime about 500 seconds.
