Hierarchically Superstructured Prussian Blue Analogues: Spontaneous Assembly Synthesis and Applications as Pseudocapacitive Materials

Abstract Hierarchically superstructured Prussian blue analogues (hexacyanoferrate, M=Ni II , Co II and Cu II ) are synthesized through a spontaneous assembly technique. In sharp contrast to macroporous‐only Prussian blue analogues, the hierarchically superstructured porous Prussian blue materials are demonstrated to possess a high capacitance, which is similar to those of the conventional hybrid graphene/MnO 2 nanostructured textiles. Because sodium or potassium ions are involved in energy storage processes, more environmentally neutral electrolytes can be utilized, making the superstructured porous Prussian blue analogues a great contender for applications as high‐performance pseudocapacitors.