“…14 However, these catalysts still face issues such as insufficient catalytic activity, instability, and complex and costly preparation processes, hindering their application in long-life Zn−I 2 batteries. Recently, molecular catalysts have become popular for electrochemical catalysis such as electrochemical carbon dioxide (CO 2 ) reduction and oxygen redox reactions, exhibiting high activity, adjustability, and specificity, 15−18 batteries and other conversion-type batteries, such as lithium− sulfur batteries, 19−21 seawater batteries, 22 Li−CO 2 batteries, 23 and Zn−air batteries. 24 Here, we for the first time employ a molecular catalyst, chloro(protoporphyrinato)iron(III) (namely, Hemin), to catalyze the iodine redox reaction and suppress polyiodide shuttling for the iodine cathode.…”