fig7
Figure 7. (A) Structural and morphological analyses. Reprinted with permission[58] Copyright 2024, John Wiley and Sons; (B) The illustration of the formation of δ-MnO2 nanosheets. Reprinted with permission[114]. Copyright 2019, Elsevier; (C) Schematic sketch of the synthesis and possible cycling process of β-MnO2 and δ-MnO2 submicrospheres. Reprinted with permission[116]. Copyright 2019, Elsevier; (D) Schematic illustration of the MnO2/MXene superlattice synthesis. Reprinted with permission[117]. Copyright 2023, American Chemical Society.
