Expedited Zn 2+ diffusion in electrostatically shielded tunnels triples the capacity of spinel ZnMn 2 O 4

with 93.4% retention after 100 cycles, outperforming other state-of-the-art zinc-ion pouch systems. This electrostatic regulation strategy establishes a new paradigm for designing high-capacity, fast diffusion kinetic cathodes for application in aqueous zinc batteries.