Iodide-mediated intermediate regulation strategy enables high-capacity and ultra-stable zinc-iodine batteries.

ABSTRACT: The practical implementation of aqueous zinc-iodine (Zn-I₂) batteries is hindered by the limited cathode capacity, rampant Zn dendrite formation, and anode corrosion issues. In this work, we propose a novel iodide-mediated intermediate regulation strategy achieved through a rationally designed combination of zinc iodide (ZnI₂) and high-loading cathodes. Mechanistic studies reveal that iodide ions (I^-) generate abundant iodine active sites on the elemental iodine-embedded porous carbon cathode (I₂@PAC), which facilitates the conversion of under-oxidized triiodide (I₃ ^-) to pentaiodide (I₅ ^-), thereby significantly enhancing cathode capacity. Concurrently, the I^- coordinate with Zn²⁺

SUBMITTER: Xu Z 

PROVIDER: S-EPMC12184782 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature