(A) Schematic crystal structures of Prussian blue frameworks. Reproduced with permission from Ref. [173]. Copyright©2016, American Chemical Society. (B) Schematic illustration of the synthetic route of M@H-PBA. Reproduced with permission from Ref. [187]. Copyright©2025, American Chemical Society. (C) Schematic illustration of NiCoMnPB synthesized by a simple one-pot method. Reproduced with permission from Ref. [188]. Copyright©2024, Elsevier B.V. (D, E) TEM images at different magnifications of HCS-PBMN samples. (F) Schematic illustration of the extraction process of Na⁺ ions. (D–F) Reproduced with permission from Ref. [189]. Copyright©2018, Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. (G) SEM, (H) TEM images, and (I) SAED pattern of BTA-PB-1.6. (G–I) Reproduced with permission from Ref. [190]. Copyright©2024, American Chemical Society. (J) Sketch map of nanostructure engineering route for a stepwise hollow PBA nanoframes/CNTs cathode. (K) Field emission (FESEM) image of FeHCFe nanoframes/CNTs composites. (L) Test performance at high rates for FeHCFe nanoframe/CNTs composite cathode materials. (M) Cycle performance of the FeHCFe nanoframes/CNTs and FeHCFe nanocube/CNTs composite cathode materials at 5 C. (N) The impedance spectrum of both FeHCFe nanoframes/CNTs and FeHCFe nanocube samples. (J–N) Reproduced with permission from Ref. [191]. Copyright©2020, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.