Tuning the performance of zinc hexacyanoferrate cathodes via ferrocyanide/ferricyanide precursor selection for high-efficiency zinc-ion storage

Prussian blue analogs (PBAs) are promising zinc-ion battery cathodes. This study synthesized ZnHCF using Na₄[Fe(CN)₆], K₃[Fe(CN)₆], and K₄[Fe(CN)₆] precursors. K₃[Fe(CN)₆]-derived ZnHCF exhibited minimal water/alkali residue and superior cyclability (70.5% retention after 800 cycles), providing insights for optimizing PBAs-based cathodes.