ABSTRACT The development of aqueous zinc–iodine (Zn–I 2 ) batteries is constrained by severe polyiodide shuttling, dendrite growth, and the hydrogen evolution reaction (HER). Herein, a TiO 2 ‐coated TiN nanowire array electrode is designed through the synergistic integration of facet engineering and heterointerface construction, enabling the simultaneous suppression of these issues. Facet engineering allows the concurrent exposure of the thermodynamically stable TiO 2 (101) facets and the high‐e