Analysing the impact of Potassium Chloride Concentration on the Electrical behaviour of a Rolled Galvanic cell

Abstract

This study explores how the concentration of the salt bridge electrolyte affects the performance of a rolled Zn–Cu galvanic cell. By using KCl at two concentrations of 0.1 M and 0.5 M, we observed that increased electrolyte concentration resulted with an 8.4% increase in power output. Voltage rose from 0.7669 V to 0.7839 V, current from 2.202 mA to 2.335 mA, and internal resistance decreased from 0.348 Ω to 0.336 Ω. Although the salt bridge does not participate directly in redox reactions, our findings highlight its significant role in charge transport. These results suggest that optimizing electrolyte concentration offers a simple yet effective strategy to improve cell efficiency without altering core components of the cell such as electrode material.  This has implications to optimise energy use within rural regions or disaster zones. Further research should explore a broader range of concentrations and electrolyte types, with statistical validation and time-based performance analysis.