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

Monoclinic Silver Vanadate (Ag0.33V2O5) as a High‐Capacity Stable Cathode Material for Aqueous Manganese Batteries DOI Creative Commons
Hyunjun Lee, Hyungjin Lee,

Jangwook Pyun

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(39)

Published: Aug. 13, 2024

Abstract Aqueous rechargeable metal batteries have recently garnered considerable attention owing to their low cost, sufficient capacity, and the use of non‐flammable water‐based electrolytes. Among them, manganese are particularly favored because stability, abundance, affordability, high energy density. Despite advantages, Mn storage host structures remain underexplored. Therefore, developing innovative materials is crucial for advancing this field. In paper, study reports first time, Ag 0.33 V 2 O 5 as a cathode material in aqueous batteries. The explains displacement/intercalation behavior silver using electrochemical, structural, spectroscopic analyses. Additionally, it shown that cation (Ag + , 2+ H ) diffusion pathways can be simulated diffusion‐barrier calculations. Finally, demonstrates high‐performance exhibit remarkable reversible capacity ≈261.9 mAh g −1 at current 0.1 A an excellent cycle retention 69.1% after 2000 cycles density 1.5 A/g. findings contribute advancement battery technology, offering promising pathway safer, more cost‐effective, systems.

Language: Английский

Citations

4
The Charge Storage Mechanism and Durable Operation in Olivine–Lithium–Iron–Phosphate for Mn‐based Hybrid Batteries DOI Creative Commons

Jangwook Pyun,

Hyungjin Lee, Hyeonjun Lee

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Abstract Aqueous batteries have garnered considerable attention because of their cost‐effectiveness, sufficient capacity, and non‐flammable water‐based electrolytes. Among these, manganese are particularly attractive owing to stability, abundance, affordability, higher energy density. With a lower redox potential (Mn: −1.19 V vs SHE) than zinc (Zn: −0.76 SHE), theoretically offer superior density over traditional zinc‐based systems. In this study, LiFePO 4 is introduced as cathode material in aqueous manganese‐based hybrid for the first time. Through electrochemical characterization advanced structural spectroscopic analyses, charge storage mechanisms protons FePO elucidated. Cation diffusion pathways also investigated via barrier calculations. This study presents with good stability capacity ≈109.2 mAh g −1 at 40 mA , alongside cycle retention 42.1% after 3000 cycles 320 . Furthermore, an Mn 2+ /Li + battery, achieving ≈1.6 durability (81.5% @ 1000th), proposed.

Language: Английский

Citations

0
Nonaqueous Electrolyte Rechargeable Manganese Batteries with Potassium Manganese Hexacyanoferrate Cathodes DOI Creative Commons

Jangwook Pyun,

Hyunjun Lee,

Seunghyeop Baek

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

Abstract Manganese batteries garnered significant attention as sustainable and cost‐effective alternatives to lithium‐ion batteries. For the first time, manganese are demonstrated using a hexacyanoferrate cathode organic electrolyte solution, specifically saturated Mn(ClO₄)₂ in acetonitrile. The exhibits an average operating voltage of 1.7 V discharge capacity 73.4 mAh g −1 at 0.1 A , retaining 71.1% after 1500 cycles 0.2 . Diffusion pathways barriers reveal efficient 3D Mn 2 ⁺ ion diffusion within framework, with low migration barrier 0.514 eV. Despite promising performance, surface analysis metal anode reveals formation complex organic/inorganic SEI (solid interphase) layers, including MnO x MnCl compounds, due decomposition. These findings highlight critical importance layer control optimization for enhancing durability efficiency electrolyte‐based established viable next‐generation energy storage solution provide foundation further advancements battery systems.

Language: Английский

Citations

0
Layered Iron Vanadate for High‐Performance and Stable Cathode Material for Aqueous Manganese Batteries DOI Creative Commons

Seunghyeop Baek,

Dedy Setiawan, Hyeonjun Lee

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 7, 2025

Abstract Aqueous rechargeable metal batteries have gained significant attention because of the low cost, high capacity, and inherent safety offered by nonflammable water‐based electrolytes. Among these, Mn‐based systems are promising owing to their intrinsic stability, abundance, affordability, energy density. Despite these advantages, development suitable host structures for Mn storage remains underexplored. This study introduces layered iron vanadate, FeV 3 O 9 ·1.1H 2 O, as a new cathode material aqueous batteries, demonstrating exceptional performance. The exhibits reversible capacity 306.9 mAh g −1 at 0.25 A an excellent rate performance 210.6 . In addition, outstanding cycling retaining 73.4% its initial after 3000 cycles − ¹, which is attributed volume expansion. underlying reaction mechanism elucidated through spectroscopic microscopic analyses. When integrated into final cell, system demonstrates superior compared Zn underscoring potential next‐generation battery systems. These findings advance technology, paving way safer, more cost‐effective, high‐performance solutions.

Language: Английский

Citations

0
Oxygen Vacancy‐Driven High‐Performance V2O5 Cathodes for Aqueous Manganese Metal Batteries DOI Creative Commons
Sang Ki Lee, Hyungjin Lee, Hyunjun Lee

et al.

Energy & environment materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 14, 2025

Aqueous batteries are an emerging next‐generation technology for large‐scale energy storage. Among various metal‐ion systems, manganese‐based have attracted significant interest due to their superior theoretical density over zinc‐based battery systems. This study demonstrates oxygen vacancy‐engineered vanadium oxide (V 2 O 4.85 ) as a high‐performance cathode material aqueous manganese metal batteries. The V had discharge capacity of 212.6 mAh g −1 at 0.1 A , retaining 89.5% after 500 cycles. Oxygen vacancies enhanced ion diffusion and reduced migration barriers, facilitating both Mn 2+ H + intercalation. Proton intercalation dominated charge storage, forming Mn(OH) layers, whereas contributed surface‐limited reactions. Furthermore, significantly higher operating voltage than that zinc Despite challenges with hydrogen evolution reactions the anode, this underscores potential future storage

Language: Английский

Citations

0
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

Citations

0