Aqueous zinc-iodine batteries are promising candidates for large-scale energystorage due to their high energy density and low cost. However, theirdevelopment is hindered by several drawbacks, including zinc dendrites,anode corrosion, and the shuttle of polyiodides. Here, the design of2D-shaped tungsten boride nanosheets with abundant borophenesubunits-based active sites is reported to guide the (002) plane-dominateddeposition of zinc while suppressing side reactions, which facilitatesinterfacial nucleation and uniform growth of zinc. Meanwhile, the interfaciald-band orbits of tungsten sites can further enhance the anchoring ofpolyiodides on the surface, to promote the electrocatalytic redox conversion ofiodine. The resulting tungsten boride-based I₂ cathodes in zinc-iodine cellsexhibit impressive cyclic stability after 5000 cycles at 50 C, which acceleratesthe practical applications of zinc-iodine batteries.