Co-activation for enhanced K-ion storage in battery anodes

National Science Review, Journal Year: 2023, Volume and Issue: 10(7)

Published: April 25, 2023

The relative natural abundance of potassium and potentially high energy density has established potassium-ion batteries as a promising technology for future large-scale global storage. However, the anodes' low capacity discharge platform lead to density, which impedes their rapid development. Herein, we present possible co-activation mechanism between bismuth (Bi) tin (Sn) that enhances K-ion storage in battery anodes. co-activated Bi-Sn anode delivered 634 mAh g

Language: Английский

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Metal-organic frameworks and beyond: The road toward zinc-based batteries

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 488, P. 215190 - 215190

Published: May 2, 2023

Language: Английский

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Soft–Rigid Heterostructures with Functional Cation Vacancies for Fast‐Charging and High‐Capacity Sodium Storage

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(40)

Published: Aug. 2, 2023

Optimizing charge transfer and alleviating volume expansion in electrode materials are critical to maximize electrochemical performance for energy-storage systems. Herein, an atomically thin soft-rigid Co9 S8 @MoS2 core-shell heterostructure with dual cation vacancies at the atomic interface is constructed as a promising anode high-performance sodium-ion batteries. The involving VCo VMo soft MoS2 shell afford ionic pathways rapid transfer, well rigid core acting dominant active component resisting structural deformation during charge-discharge. Electrochemical testing theoretical calculations demonstrate both excellent Na+ -transfer kinetics pseudocapacitive behavior. Consequently, delivers extraordinary sodium-storage (389.7 mA h g-1 after 500 cycles 5.0 A ), superior those of single-phase counterparts: assembled Na3 V2 (PO4 )3 ||d-Co9 /S-Gr full cell achieves energy density 235.5 Wh kg-1 0.5 C. This finding opens up unique strategy broadens horizons material design storage conversion.

Language: Английский

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Three-Dimensional Zinc-Seeded Carbon Nanofiber Architectures as Lightweight and Flexible Hosts for a Highly Reversible Zinc Metal Anode

ACS Nano, Journal Year: 2023, Volume and Issue: 17(19), P. 19087 - 19097

Published: Sept. 19, 2023

Uneven zinc (Zn) deposition typically leads to uncontrollable dendrite growth, which renders an unsatisfactory cycling stability and Coulombic efficiency (CE) of aqueous ion batteries (ZIBs), restricting their practical application. In this work, a lightweight flexible three-dimensional (3D) carbon nanofiber architecture with uniform Zn seeds (CNF-Zn) is prepared from bacterial cellulose (BC), kind biomass low cost, environmental friendliness, abundance, as host for highly reversible plating/stripping construction high-performance ZIBs. The as-prepared 3D CNF-Zn porous interconnected network significantly decreases the local current density, functional provide nuclei guide deposition. Benefiting synergistic effect framework in host, electrochemical performance as-constructed ZIBs improved. This delivers high stable CE 99.5% over 450 cycles, ensuring outstanding rate long cycle life 500 cycles at 4 A g-1 CNF-Zn@Zn//NaV3O8·1.5H2O full battery. More importantly, owing flexibility as-assembled pouch cell shows mechanical excellent energy storage performance. strategy producing readily accessible can be employed develop advanced nanomaterials next-generation devices.

Language: Английский

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Tailoring desolvation strategies for aqueous zinc-ion batteries

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 4819 - 4846

Published: Jan. 1, 2024

This review provides a comprehensive overview detailing the advancements in desolvation strategies pertaining to aqueous zinc-ion batteries (AZIBs) performances, addressing applications and working mechanisms of AZIBs.

Language: Английский

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Discovering Cathodic Biocompatibility for Aqueous Zn–MnO2 Battery: An Integrating Biomass Carbon Strategy

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 16(1)

Published: Feb. 5, 2024

Developing high-performance aqueous Zn-ion batteries from sustainable biomass becomes increasingly vital for large-scale energy storage in the foreseeable future. Therefore, γ-MnO

Language: Английский

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Ultra-thick, dense dual-encapsulated Sb anode architecture with conductively elastic networks promises potassium-ion batteries with high areal and volumetric capacities

eScience, Journal Year: 2023, Volume and Issue: 3(6), P. 100177 - 100177

Published: Aug. 23, 2023

Ultra-thick, dense alloy-type anodes are promising for achieving large areal and volumetric performance in potassium-ion batteries (PIBs), but severe volume expansion as well sluggish ion electron diffusion kinetics heavily impede their widespread application. Herein, we design highly (3.1 g cm–3) Ti3C2Tx MXene graphene dual-encapsulated nano-Sb monolith architectures (HD-Sb@Ti3C2Tx-G) with high-conductivity elastic networks (1560 S m–1) compact dually encapsulated structures, which exhibit a capacity of 1780.2 mAh cm–3 (gravimetric capacity: 565.0 g–1), long-term stable lifespan 500 cycles 82% retention, 8.6 cm–2 (loading: 31 mg cm–2) PIBs. Using ex-situ SEM, in-situ TEM, kinetic investigations, theoretical calculations, reveal that the excellent mechanism stems from three dimensional (3D) Sb architecture graphene; these effectively mitigate against pulverization Sb, offering good electrolyte penetration rapid ionic/electronic transmission. also decreases K+ energy barrier, ultra-thick electrode ensures performance. These findings provide feasible strategy fabricating ultra-thick, electrodes to achieve high storage via highly-dense, conductive networks.

Language: Английский

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Defect-Free Prussian Blue Analogue as Zero-Strain Cathode Material for High-Energy-Density Potassium-Ion Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(9), P. 7287 - 7297

Published: Feb. 19, 2024

Prussian blue analogues (PBAs) have been widely studied as cathodes for potassium-ion batteries (PIBs) due to their three-dimensional framework structure and easily adjustable composition. However, the phase transition behavior [Fe(CN)6]4– anionic defects severely deteriorate electrochemical performances. Herein, we propose a defect-free potassium iron manganese hexacyanoferrate (K1.47Fe0.5Mn0.5[Fe(CN)6]·1.26H2O, KFMHCF-1/2) cathode material PIBs. The Fe–Mn binary synergistic effects can inhibit cell volume change octahedral slip during K-ion insertion/extraction process, so that transformation (monoclinic ↔ cubic) is effectively inhibited, achieving zero-strain solid solution mechanism employing Fe Mn dual active-sites. Thus, KFMHCF-1/2 contributes highest initial capacity of 155.3 mAh·g–1 with an energy density 599.5 Wh·kg–1 at 10 mA·g–1 among reported PBA cathodes, superior rate capability, cyclic stability over 450 cycles. assembled full battery using K deposited on graphite (K@G) anode also delivers high reversible specific 131.1 20 ultralong lifespans 1000 cycles 50 lowest decay 0.044% per cycle. This work will promote rapid application high-energy-density

Language: Английский

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Progress and prospect of vanadates as aqueous zn-ion batteries cathodes

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 498, P. 215461 - 215461

Published: Oct. 1, 2023

Language: Английский

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Conductive Metal–Organic Framework with Superior Redox Activity as a Stable High-Capacity Anode for High-Temperature K-Ion Batteries

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(10), P. 6753 - 6762

Published: Feb. 27, 2024

High-temperature rechargeable batteries are essential for energy storage in elevated-temperature situations. Due to the resource abundance of potassium, high-temperature K-ion drawing increasing research interest. However, raising working temperature would aggravate chemical and mechanical instability KIB anode, resulting very fast capacity fading, especially when high is pursued. Here, we demonstrated that a porous conductive metal–organic framework (MOF), which constructed by N-rich aromatic molecules CuO4 units via π–d conjugation, could provide multiple accessible redox-active sites promised robust structure stability efficient potassium at temperatures. Even 60 °C, this MOF anode deliver initial (455 mAh g–1), impressive rate, extraordinary cyclability (96.7% retention 1600 cycles), much better than those reported anodes. The mechanistic study revealed C═N groups contributed abundant sites; synergistic effect conjugated character reticular architecture facilitated K+/e– transport ensured an insoluble electrode with small volume deformation, thus achieving stable high-capacity storage.

Language: Английский

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