Recent advances in rational design for high-performance potassium-ion batteries

Chemical Society Reviews, Год журнала: 2024, Номер 53(13), С. 7202 - 7298

Опубликована: Янв. 1, 2024

The growing global energy demand necessitates the development of renewable solutions to mitigate greenhouse gas emissions and air pollution. To efficiently utilize yet intermittent sources such as solar wind power, there is a critical need for large-scale storage systems (EES) with high electrochemical performance. While lithium-ion batteries (LIBs) have been successfully used EES, surging price, coupled limited supply crucial metals like lithium cobalt, raised concerns about future sustainability. In this context, potassium-ion (PIBs) emerged promising alternatives commercial LIBs. Leveraging low cost potassium resources, abundant natural reserves, similar chemical properties potassium, PIBs exhibit excellent ion transport kinetics in electrolytes. This review starts from fundamental principles structural regulation PIBs, offering comprehensive overview their current research status. It covers cathode materials, anode electrolytes, binders, separators, combining insights full battery performance, degradation mechanisms,

Язык: Английский

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Research development on electrolytes for magnesium-ion batteries

Science Bulletin, Год журнала: 2023, Номер 68(16), С. 1819 - 1842

Опубликована: Июль 20, 2023

Язык: Английский

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A P2/P3 Biphasic Layered Oxide Composite as a High‐Energy and Long‐Cycle‐Life Cathode for Potassium‐Ion Batteries

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(17)

Опубликована: Март 5, 2024

Abstract Layered transition metal oxides are extensively considered as appealing cathode candidates for potassium‐ion batteries (PIBs) due to their abundant raw materials and low cost, but further implementations limited by slow dynamics impoverished structural stability. Herein, a layered composite having P2 P3 symbiotic structure is designed synthesized realize PIBs with large energy density long‐term cycling The unique intergrowth of phases in the obtained oxide plainly characterized X‐ray diffraction refinement, high‐angle annular dark field bright field‐scanning transmission electron microscopy at atomic resolution, Fourier transformation images. synergistic effect two this P2/P3 well demonstrated K + intercalation/extraction process. as‐prepared can present discharge capacity remarkable 321 Wh kg −1 also manifest excellent preservation after 600 cycles uptake/removal.

Язык: Английский

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Rational Regulation of High-Voltage Stability in Potassium Layered Oxide Cathodes

ACS Nano, Год журнала: 2024, Номер 18(20), С. 13415 - 13427

Опубликована: Май 10, 2024

Layered oxide cathode materials may undergo irreversible oxygen loss and severe phase transitions during high voltage cycling be susceptible to transition metal dissolution, adversely affecting their electrochemical performance. Here, address these challenges, we propose synergistic doping of nonmetallic elements in situ diffusion as potential solution strategies. Among them, the distribution element fluorine within material can regulated by boron, thereby suppressing manganese dissolution through surface enrichment fluorine. Furthermore, from into bulk after charging reduces energy barrier potassium ion while effectively inhibiting under voltage. The modified K0.5Mn0.83Mg0.1Ti0.05B0.02F0.1O1.9 layered exhibits a capacity 147 mAh g–1 at 50 mA long cycle life 2200 cycles 500 g–1. This work demonstrates efficacy provides valuable insights for optimizing rechargeable battery materials.

Язык: Английский

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Nonflammable Phosphate‐Based Electrolyte for Safe and Stable Potassium Batteries Enabled by Optimized Solvation Effect

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(29)

Опубликована: Май 6, 2024

Abstract Current potassium‐ion batteries (PIBs) are limited in safety and lifetime owing to the lack of suitable electrolyte solutions. To address these issues, herein, we report an innovative non‐flammable design strategy that leverages optimal moderate solvation phosphate‐based solvent which strikes a balance between capability salt dissociation ability, leading superior electrochemical performance. The formulated simultaneously exhibits advantages low concentration (only 0.6 M), viscosity, high ionic conductivity, oxidative stability, safety. Our also promotes formation self‐limiting inorganic‐rich interphases at anode surface, alongside robust cathode‐electrolyte interphase on iron‐based Prussian blue analogues, mitigating electrode/electrolyte side reactions preventing Fe dissolution. Notably, PIBs employing our exhibit exceptional durability, with 80 % capacity retention after 2,000 cycles high‐voltage 4.2 V coin cell. Impressively, larger scale pouch cell, it maintains over 81 its initial 1,400 1 C‐rate average Coulombic efficiency 99.6 %. This work represents significant advancement toward realization safe, sustainable, high‐performance PIBs.

Язык: Английский

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Recent Advances in High‐Entropy Layered Oxide Cathode Materials for Alkali Metal‐Ion Batteries

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 29, 2024

Abstract Since the electrochemical de/intercalation behavior is first detected in 1980, layered oxides have become most promising cathode material for alkali metal‐ion batteries (Li + /Na /K ; AMIBs) owing to their facile synthesis and excellent theoretical capacities. However, inherent drawbacks of unstable structural evolution sluggish diffusion kinetics deteriorate performance, limiting further large‐scale applications. To solve these issues, novel strategy high entropy has been widely applied oxide cathodes AMIBs recent years. Through multielement synergy stabilization effects, high‐entropy (HELOs) can achieve adjustable activity enhanced stability. Herein, basic concepts, design principles, methods HELO are introduced systematically. Notably, it explores detail improvements on limitations oxides, highlighting latest advances materials field AMIBs. In addition, introduces advanced characterization calculations HELOs proposes potential future research directions optimization strategies, providing inspiration researchers develop areas energy storage conversion.

Язык: Английский

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Multiple Electron Transfers Enable High‐Capacity Cathode Through Stable Anionic Redox

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 13, 2025

Abstract Single‐electron transfer, low alkali metal contents, and large‐molecular masses limit the capacity of cathodes. This study uses a cost‐effective light‐molecular‐mass orthosilicate material, K 2 FeSiO 4 , with high initial potassium content, as cathode for potassium‐ion batteries to enable transfer more than one electron. Despite limited valence change Fe ions during cycling, can undergo multiple electron transfers via successive oxygen anionic redox reactions generate reversible capacity. Although formation O‒O dimers in occur upon removing large amounts potassium, strong binding effect Si on O mitigates irreversible release voltage degradation cycling. achieves 236 mAh g −1 at 50 mA an energy density 520 Wh kg which be comparable commercial LiFePO materials. Moreover, it also exhibits 1400 stable cycles under high‐current conditions. These findings enhance potential commercialization prospects batteries.

Язык: Английский

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KI-Assisted Formation of Spindle-like Prussian White Nanoparticles for High-Performance Potassium-Ion Battery Cathodes

Nano Letters, Год журнала: 2023, Номер 23(21), С. 10066 - 10073

Опубликована: Окт. 17, 2023

Prussian white (PW) is considered as a promising cathode material for potassium-ion batteries (KIBs) due to its low cost and high theoretical capacity. However, the water content structural defects strict synthesis conditions of PW lead unsatisfactory cycling performance specific capacity, hindering practical applications. Herein, template-engaged reduction method proposed, using MIL-88B(Fe) self-template KI reducing agent prepare K-rich with content. Furthermore, hierarchical porous spindle-like morphology can be inherited from precursor, furnishing sufficient active sites ion diffusion path. Consequently, when applied KIB material, (K1.72Fe[Fe(CN)6]0.96·0.342H2O) manifested remarkable potassium storage properties. Notably, full cell assembled by graphite anode exhibited large energy density ∼216.7 Wh kg-1, demonstrating huge potential systems.

Язык: Английский

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High Entropy-Induced Kinetics Improvement and Phase Transition Suppression in K-Ion Battery Layered Cathodes

ACS Nano, Год журнала: 2023, Номер 18(1), С. 337 - 346

Опубликована: Дек. 19, 2023

Layered oxides are widely accepted to be promising cathode candidate materials for K-ion batteries (KIBs) in terms of their rich raw and low price, while further applications restricted by sluggish kinetics poor structural stability. Here, the high-entropy design concept is introduced into layered KIB cathodes address above issues, an example K0.45Mn0.60Ni0.075Fe0.075Co0.075Ti0.10Cu0.05Mg0.025O2 (HE-KMO) successfully prepared. Benefiting from oxide with multielement doping, developed HE-KMO exhibits half-metallic features a narrow bandgap 0.19 eV. Increased entropy can also reduce surface energy {010} active facets, resulting about 2.6 times more exposure facets than low-entropy K0.45MnO2 (KMO). Both effectively improve electron conduction K+ diffusion. Furthermore, high inhibit space charge ordering during (de)insertion, transition metal–oxygen covalent interaction enhanced, leading suppressed phase 1.5–4.2 V better electrochemical stability (average capacity drop 0.20%, 200 cycles) KMO 0.41%, wide voltage window.

Язык: Английский

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Ultrathin Cobalt-Based Prussian Blue Analogue Nanosheet-Assembled Nanoboxes Interpenetrated with Carbon Nanotubes as a Fast Electron/Potassium-Ion Conductor for Superior Potassium Storage

Nano Letters, Год журнала: 2023, Номер 23(20), С. 9594 - 9601

Опубликована: Окт. 16, 2023

Rechargeable potassium-ion batteries (PIBs) are regarded as potential substitutes for industrial lithium-ion in large scale energy storage systems due to the world's abundant potassium supplies. Althogh cobalt hexacyanocobaltate (CoHCC) exhibits broad a PIB anode material, its performance is currently unsatisfactory. Herein, novel 5 nm ultrathin CoHCC nanosheet-assembled nanoboxes with interspersed carbon nanotubes (CNTs/CoHCC nanoboxes) fabricated realize highly reactive anode. The layers substantially accelerate electron conduction and provide numerous active sites, while connected CNTs fast axial transport. Consequently, optimized remarkable discharge capacity of 580.9 mAh g-1 at 0.1 A long-term stability 71.3% retention over 1000 cycles. In situ ex characterizations density functional theory calculations further employed elucidate K+ process reason enhanced CNTs/CoHCC nanoboxes.

Язык: Английский

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