Engineering the interplanar spacing of ammonium vanadates as a high-performance aqueous zinc-ion battery cathode

We report a series of ammonium vanadates as cathodes for aqueous ZIBs and provide insights into the origin of the enhanced electrochemical behaviors. The NH₄V₄O₁₀ compound, with the largest interplanar spacing (9.8 Å), exhibits excellent electrochemical performance.