A 2-volt Aqueous Battery Enabled by Synergistic Effect of Cu2+/Cu+ Redox and Intercalation/Deintercalation in Copper Hexacyanoferrate Cathodes

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104088 - 104088

Published: Feb. 1, 2025

Language: Английский

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Enabling High‐Rate and Long‐Cycling Zinc–Air Batteries with a ΔE = 0.56 V Bifunctional Oxygen Electrocatalyst

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Zn–air batteries (ZABs) are promising next‐generation energy storage devices due to their low cost, intrinsic safety, and environmental benignity. However, the sluggish kinetics of cathodic reactions severely limits ZAB performances in practical use, calling for high‐efficiency bifunctional oxygen reduction evolution electrocatalysts. Herein, an ultrahigh‐active electrocatalyst is developed with a record‐low Δ E 0.56 V, significantly outperforming noble‐metal‐based benchmark (Pt/C+Ir/C, = 0.77 V) many other reported electrocatalysts (mostly ≥ 0.60 V). The nanoscale composite Fe‐based single‐atom sites nanosized layered double hydroxides endows high conductivity large active surface that afford strengthened electron conduction ion transport pathways. Furthermore, remarkable improvement stability realized following current division principle. ZABs deliver peak power density 198 mW cm −2 excellent cycling durability over 6000 cycles. Moreover, ampere‐hour‐scale constructed cycled under 1.0 A Ah conditions. This work breaks activity record electrocatalysis expands potential sustainable storage.

Language: Английский

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Regulating H-bonded network of aqueous electrolytes for stable and energy-dense Al-air batteries

Energy storage materials, Journal Year: 2024, Volume and Issue: unknown, P. 103772 - 103772

Published: Sept. 1, 2024

Language: Английский

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Optimization of 3D Metal‐Based Assemblies for Efficient Electrocatalysis: Structural and Mechanistic Studies

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

Published: March 17, 2025

Abstract The commercial utilization of low‐dimensional catalysts has been hindered by their propensity for agglomeration and stacking, greatly minimizing active sites. To circumvent this problem, materials can be assembled into systematic 3D architectures to synergistically retain the benefits constituent nanomaterials, with value‐added bulk properties such as increased surface area, improved charge transport pathways, enhanced mass transfer, leading higher catalytic activity durability compared constituents. hierarchical organization building blocks within structures also enables precise control over catalyst's morphology, composition, chemistry, facilitating tailored design specific electrochemical applications. Despite surge in metal‐based assemblies, there are no reviews encompassing different types assemblies from nanomaterials electrocatalysis. Herein, review addresses gap investigating various self‐supported exploring how electrocatalytic performance elevated through structural modifications mechanistic studies tailor them reactions.

Language: Английский

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Single‐Atom Co Meets Remote Fe for a Synergistic Boost in Oxygen Electrocatalysis

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract The oxygen electrocatalytic activity of transition metal catalysts can be tuned by tailoring their microstructure to optimize electronic configuration. Here, a one‐step Coordination‐Selective Synthesis strategy is developed integrate Co single‐atom sites and Fe‐based nanoparticles within the same matrix, enabling long‐range interactions that enhance Co‐N 4 reactivity improve reduction reaction performance. X‐ray absorption spectroscopy confirmed remote modulate electron distribution at sites. Structural characterizations reveal optimal catalyst, 50% Fe ‐NC, contains metallic Fe, 3 O , N species. Electrochemical measurements show it achieves onset half‐wave potentials 0.984 0.927 V versus RHE, surpassing 100% ‐NC with only Additionally, demonstrates efficient evolution performance, achieving an overpotential 298 mV 20 mA cm −2 comparable RuO 2 . Density functional theory calculations optimizes O‐containing intermediate adsorption/desorption, lowering theoretical overpotential. Zn‐air batteries assembled exhibited superior performance Pt/C, highlighting its potential for bifunctional electrocatalysis. This study provides approach designing high‐performance utilizing synergistic between atomic nanoscale

Language: Английский

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Honeycomb-Like Single-Atom Catalysts with FeN3Cl Sites for High-Performance Oxygen Reduction

Advanced Powder Materials, Journal Year: 2025, Volume and Issue: unknown, P. 100298 - 100298

Published: April 1, 2025

Language: Английский

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Metal-organic polyhedrons modulated eccentric solvation sheath enables fast charge transfer kinetics in nonaqueous Zn electrolytes

Energy storage materials, Journal Year: 2024, Volume and Issue: 74, P. 103957 - 103957

Published: Dec. 10, 2024

Language: Английский

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