Rhombohedral Zinc Hexacyanoferrate as a High‐Voltage Cathode Material for Aqueous Mn‐ion Batteries DOI Creative Commons

Jangwook Pyun,

Hyungjin Lee, Hyeonjun Lee

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 23, 2025

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 low manganese redox potential −1.19 V (vs standard hydrogen electrode) well high operating voltage and capacity. In this study, rhombohedral zinc Prussian blue analog (ZnHCF) is investigated for first time cathode material manganese‐ion demonstrating highest reported in field (0.55 vs Ag/AgCl or 1.94 Mn/Mn 2 ⁺). ZnHCF exhibits discharge capacity 79.2 mAh g −1 at 0.2 A with excellent stability, retaining its original performance after 4000 cycles. By performing comprehensive electrochemical characterization, advanced structural analysis, spectroscopic studies, diffusion pathway energy barrier calculations, charge storage mechanism behavior are elucidated. This study underlines application high‐performing helps achieve better understanding Mn electrochemistry, valuable insights advancing toward efficient sustainable storage.

Language: Английский

Rhombohedral Zinc Hexacyanoferrate as a High‐Voltage Cathode Material for Aqueous Mn‐ion Batteries DOI Creative Commons

Jangwook Pyun,

Hyungjin Lee, Hyeonjun Lee

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 23, 2025

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 low manganese redox potential −1.19 V (vs standard hydrogen electrode) well high operating voltage and capacity. In this study, rhombohedral zinc Prussian blue analog (ZnHCF) is investigated for first time cathode material manganese‐ion demonstrating highest reported in field (0.55 vs Ag/AgCl or 1.94 Mn/Mn 2 ⁺). ZnHCF exhibits discharge capacity 79.2 mAh g −1 at 0.2 A with excellent stability, retaining its original performance after 4000 cycles. By performing comprehensive electrochemical characterization, advanced structural analysis, spectroscopic studies, diffusion pathway energy barrier calculations, charge storage mechanism behavior are elucidated. This study underlines application high‐performing helps achieve better understanding Mn electrochemistry, valuable insights advancing toward efficient sustainable storage.

Language: Английский

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