Crystal engineering of bimetallic cobalt-based metal–organic framework nanosheets for high-performance aqueous rechargeable cobalt-zinc batteries

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 665, P. 172 - 180

Published: March 20, 2024

Language: Английский

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Rational Design Toward Advanced Non‐Flow Aqueous Zinc‐Bromine Systems Boosted by Alkaline‐Neutral Decoupling Electrolytes

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: April 9, 2024

Abstract Non‐flow aqueous zinc‐bromine batteries (AZBBs) are highly attractive owing to their lightweight construction and largely reduced cost compared with the flow ones. Yet, development is restricted by sluggish reaction kinetics of Br 2 /Br − , shuttle soluble polybromide species (Br n odd), poor stability Zn‐based anode. Herein, an effective alkaline‐neutral electrolyte decoupling system constructed mitigate these issues, where nitrogen‐doped carbon felt high catalytic activity developed for cathode, a cost‐effective cation exchange membrane (CEM) polyethersulfone/sulfonated polyether ether ketone (PES/SPEEK‐M) that can stop used as separator, glucose inhibit dendrites introduced anolyte additive. The flowless AZBB mainly consists two separate redox couples, including Zn/Zn(OH) 4 2− in alkaline neutral media, non‐cations (e.g. OH Zn(OH) H O, ) be respective chamber PES/SPEEK‐M while cations pass by. In optimized system, good electrochemical performance achieved, surprising discharge voltage 2.01 V, average Coulombic efficiency 96.7%, cycling life ≈1000 cycles without obvious capacity decay at fixed charge mAh cm −2 .

Language: Английский

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Carbon Superstructure‐Supported Half‐Metallic V₂O₃ Nanospheres for High‐Efficiency Photorechargeable Zinc Ion Batteries

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(38)

Published: June 26, 2024

Abstract Photorechargeable zinc ion batteries (PZIBs), which can directly harvest and store solar energy, are promising technologies for the development of a renewable energy society. However, incompatibility requirement between narrow band gap wide coverage has raised severe challenges high‐efficiency dual‐functional photocathodes. Herein, half‐metallic vanadium (III) oxide (V 2 O 3 ) was first reported as photocathode PZIBs. Theoretical experimental results revealed its unique photoelectrical storage properties capturing storing energy. To this end, synergistic protective etching strategy developed to construct carbon superstructure‐supported V nanospheres @CSs). The characteristics , combined with three‐dimensional superstructure assembled by ultrathin nanosheets, established rapid charge transfer networks robust framework efficient stable solar‐energy storage. Consequently, @CSs delivered record properties, including photo‐assisted discharge capacities 463 mA ⋅ h g −1 at 2.0 A long‐term cycling stability over 3000 cycles. Notably, PZIBs using photocathodes could be photorecharged without an external circuit, exhibiting high photo conversion efficiency (0.354 %) photorecharge voltage (1.0 V). This study offered direction direct capture

Language: Английский

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Surface Electric Field Shielding for Passivation‐Free Zinc Anode Dissolution in Alkaline Batteries

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

Published: April 8, 2025

Abstract Zinc anodes in alkaline electrolytes undergo spontaneous passivation, severely reducing their capacity utilization and battery performance. Strategies such as fabricating zinc powder or sponge structures improve by increasing reaction surface areas but often exacerbate hydrogen evolution. Here an alternative approach is reported: shielding the with miniature Faraday cages to reduce undesirable current crowding mitigate passivation. This demonstrates interwoven layer structure of bismuth dendrites on plate (Bi@Zn), achieving near‐complete dissolution over 100 mAh cm −2 discharge capacity, even low lean where bare fails rapidly. Multi‐scale characterizations simulations reveal that (Bi) delay passivation dissipating localized electric fields, thereby suppressing Zn(OH)₄ 2 ⁻ accumulation resultant ZnO precipitation near surface. As a result, primary zinc‐air using Bi@Zn achieves full discharge, whereas at one‐tenth depth. Moreover, Bi enhances anode reversibility, shown fivefold improvement cycling stability nickel‐zinc rechargeable 10 cm⁻ 20 mA . Importantly, similar high achieved copper layers underscores effectiveness field strategy.

Language: Английский

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Freestanding fibers assembled by CoPSe@N-doped carbon heterostructures as an anode for fast potassium storage in hybrid capacitors

Journal of Energy Chemistry, Journal Year: 2023, Volume and Issue: 86, P. 587 - 598

Published: Aug. 14, 2023

Language: Английский

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