A study of electrochemical devices based on Agar-Agar-NH4I biopolymer electrolytes
2018; American Institute of Physics; Volume: 1942; Linguagem: Inglês
10.1063/1.5029150
ISSN1935-0465
AutoresS. Selvalakshmi, T. Mathavan, S. Selvasekarapandian, M. Premalatha,
Tópico(s)Supercapacitor Materials and Fabrication
ResumoA polymer electrolyte system has been developed using a biopolymer namely, Agar-Agar in combination with ammonium iodide in different weight percentages by solution casting technique. The films were characterized electrically by AC Impedance Spectroscopy for its conductivity. The highest conductivity achieved at room temperature was for 50 wt. % agar-agar: 50 wt. % NH4I with a conductivity value of 1.20 × 10-4 Scm-1. An electrochemical cell was fabricated in the configuration of: Zn + ZnSO4.7H2O + graphite (anode) | 50 wt. % (Agar-agar): 50 wt. % NH4I (electrolyte) | PbO2 + V2O5 + graphite (cathode) and it produced a maximum open circuit voltage of 1.73 V. A single PEM fuel cell was constructed with the highest conducting sample (50 wt. % (Agar-agar): 50 wt. % NH4I) and it exhibited an output voltage of 408mV.
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