Fig. 3: Study of the I-/IO3- redox process.
From: A twelve-electron conversion iodine cathode enabled by interhalogen chemistry in aqueous solution
The voltage profiles (the second cycle) of I2/HAC electrode in different electrolytes at 1 A g−1 when charged to (a) 1.0 V and (b) 1.15 V vs. SHE. c UV-vis spectra of the E-extracted solution during the charge-discharge process in H2SO4 + KBr electrolyte. d Raman spectra of 0.1 M KIO3 standard solution and the E-extracted solution been charged to 1.3 V in H2SO4 + KBr electrolyte. e The color titration of the E-extracted solution been tested in the bromide supported electrolyte (C and D represents the charge and discharge process, respectively). f UV-vis spectra of the E-extracted solution after the color titration. g The discharge voltage profiles of I2/HAC electrode at different current densities. h The redox mechanism of the proposed I-/IO3- reaction in the presence of the bromide ions. The numbers are the representative reaction stages as listed. i EIS profiles of I2/HAC electrode in different charge-discharge stages in H2SO4 electrolyte (the inset is the equivalent circuit model). The above electrolyte was 0.1 M H2SO4 or 0.1 M H2SO4 + 0.1 M KBr.
