Towards a Novel Sodium-Iodine Battery with an Aqueous Catholyte: Numerical Investigations of Complex Cathode Structures

Abstract

The publication investigates influences of foam structures on the overall battery performance of secondary sodium-iodine batteries studied. Previous work about the battery system is reviewed and compared with enhanced cathode structures. An open-pored glassy carbon foam cathode structure shows improved utilizable capacity compared to a simplified foam design. Parameter studies of foam porosity and specific surface area indicate that porosity is the crucial parameter for achievable depth of discharge. The spatially resolved model reflects species and mass transport as well as electrochemical processes and reactions.

Simulating the Impact of Glassy Carbon Foam Electrodes on the Performance of Sodium Iodine Batteries

“…A preliminary study uses a Kelvin cell design. 41 Here, the cathode electrode foam structure infiltrated with electrolyte provides a larger and more evenly distributed surface. Figure 2 shows the discharge curves for both cell designs considering different cathode lengths l c at a 1/5 C-rate.…”