Reactions of FeS2, CoS2, and NiS2 Electrodes in Molten LiCl ‐ KCl Electrolytes

The electrochemistry of the , , and electrode phases in molten electrolyte at 400°C was studied using cyclic voltammetry at sweep rates of 0.02–1 mV/sec. Emf's, polarization characteristics, and nucleation overpotentials were obtained for each major electrode reaction; the anodic nucleation overpotentials increased with emf for all three electrodes. The disulfide electrodes lost sulfur during the extended cyclic‐voltammetry tests. These losses appear to be associated with a nonequilibrium species that is involved in the electrochemical formation of the disulfides from their precursors.