Rhombohedral Zinc Hexacyanoferrate as a High-Voltage Cathode Material for Aqueous Mn-ion Batteries.

ABSTRACT: Aqueous metal batteries have emerged as a promising alternative to lithium-ion batteries, offering enhanced safety through the use of aqueous electrolytes. Manganese-ion battery systems remain underexplored despite the low manganese redox potential of -1.19 V (vs the standard hydrogen electrode) as well as high operating voltage and capacity. In this study, a rhombohedral zinc Prussian blue analog (ZnHCF) is investigated for the first time as a cathode material for manganese-ion batteries, demonstrating the highest operating voltage reported in the field (0.55 V vs Ag/AgCl or 1.94 V vs Mn/Mn²⁺). ZnHCF exhibits a discharge capacity of 79.2 mAh g^-1 at 0.2 A g^-1 with excellent stability, retaining its original performance after 4000 cycles. By performing a com

SUBMITTER: Pyun J 

PROVIDER: S-EPMC12288824 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature