Bimetallic Design Based on the Nucleation Rate of Prussian Blue Analogues for Enhanced Aqueous Zinc Ion Batteries with Glycerol–Water Hybrid Electrolytes

Abstract

Abstract A magical heterostructures of M‐PBAs (M = Co, Cu, and Zn) encapsulated by V‐PBA have been successfully obtained by a facile one‐pot coprecipitation method based on the difference in the binding energies of between these metal ions and ligands, and the nucleation rates of different M‐PBAs. Hence, due to the multiple redox pairs, open frameworks, ordered channels, and synergistic effect of two components, the obtained VM‐PBAs have been tested as cathodes in aqueous zinc‐ion batteries (AZIBs). To further inhibiting the hydrolysis of vanadium ions and the collapse of PBAs structures, a series of glycerol–water hybrid electrolyte with different content of glycerol were designed. Benefiting from the multiple hydroxyl groups, appropriate viscosity and accurate proportion of glycerol, the as‐assembled AZIBs with VMn‐PBAs cathode can exhibit excellent cycling performance (∼73% capacity retain of stable capacity) after 1000 cycles. This work provides a sight of preparation of PBAs nanomaterials and a strategy of improve the cycling stability and rate capacity of PBAs‐based cathodes in AZIBs.