Abstract
A transient one-dimensional mathematical model is developed and used to study the performance and thermal behavior of the silver–zinc cell during discharge. The model considers the negative (zinc) electrode, separator, and positive (silver) electrode and describes the simultaneous electrochemical reactions in the positive electrode, mass transfer limitations, and heat generation. Changes in porosity and electrolyte composition due to electrochemical reactions, local reaction rates, diffusion, and migration of electrolyte are reported. Emphasis is placed on understanding the movement of the reaction front in the negative electrode during discharge and its correlation to the useful capacity of the cell. The sensitivity of this capacity to changes in the values of initial electrolyte, exchange current densities, and tortuosity are presented. It is shown that under certain conditions, in a system employing 25% KOH as the electrolyte, the useful capacity of the cell could be limited to 55.6% of its rated capacity when the discharge rate is increased from 1 C to 2 C. The temperature rise in a single cell was predicted and observed to agree with the experimental values.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
