Modulating the Structure of Interlayer/Layer Matrix on δ‐MnO 2 via Cerium Doping‐Engineering toward High‐Performance Aqueous Zinc Ion Batteries

Abstract δ‐MnO 2 has been vigorously developed as an ideal cathode material for rechargeable aqueous zinc‐ion batteries (AZIBs) due to its spacious layer spacing suitable for ion storage. However, poor intrinsic conductivity, structural collapse, and sluggish reaction kinetics are major limitations restricting their battery performance. Doping engineering has been proven to be an effective strategy for modifying the structure, conductivity, and electronic properties of Mn‐based oxides. Here, a series of δ‐MnO 2 hierarchical flowers with different cerium‐doped sites are proposed as high‐performance cathodes for AZIBs, revealing the effects of various Ce doping sites on the MnO 2 layer‐by‐layer structure and…