Six-electron-conversion selenium cathodes stabilized by dead-selenium revitalizer for aqueous zinc batteries.

ABSTRACT: Aqueous zinc batteries are attractive for large-scale energy storage due to their inherent safety and sustainability. However, their widespread application has been constrained by limited energy density, underscoring a high demand of advanced cathodes with large capacity and high redox potential. Here, we report a reversible high-capacity six-electron-conversion Se cathode undergoing a ZnSe↔Se↔SeCl₄ reaction, with Br^-/Br_n^- redox couple effectively stabilizes the Zn | |Se cell. This Se conversion, initiated in a ZnCl₂-based hydrogel electrolyte, presents rapid capacity decay (from 1937.3 to 394.1 mAh g_Se^-1 after only 50 cycles at 0.5 A g_Se^-1) primarily due to the dissolution of SeCl₄

SUBMITTER: Du J 

PROVIDER: S-EPMC12008412 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature