fig5
Figure 5. Voltage-enhancement mechanism and bromine redox reversibility in the pH-asymmetric Sn-Br system. (A) Pourbaix diagram of the Sn-H2O system at 298 K, with dissolved Sn activity of 10-6 and p(SnH4) = 1. Reproduced with permission from Ref[13]. Copyright © 2025, The Author(s). Advanced Materials published by Wiley-VCH GmbH; (B) Schematic illustration of the electrode-potential alignment in the acid-alkaline dual-electrolyte configuration; (C and D) In situ UV-Vis spectra and corresponding contour plots of bromine-species evolution during charge/discharge at a current density of 0.5 A g-1. SCE: Saturated calomel electrode; SHE: standard hydrogen electrode; UV-Vis: ultraviolet-visible.
