Heterojunction Vacancies‐Promoted High Sodium Storage Capacity and Fast Reaction Kinetics of the Anodes for Ultra‐High Performance Sodium‐Ion Batteries

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

Published: Sept. 6, 2024

Abstract Transition metal sulfides as anode materials for sodium‐ion batteries (SIBs) have the advantage of high capacity. However, their cycle‐life and rate performance at ultra‐high current density is still a thorny issue that limit applicability these materials. In this paper, carbon‐embedded heterojunction with sulfur‐vacancies regulated by ultrafine bimetallic (vacancy‐CoS 2 /FeS @C) robust interfacial C‐S‐Co/Fe chemical bonds successfully synthesized explored an material battery. By changing ratio two cations, concentration anion sulfur vacancies can be in‐situ adjusted without additional post‐treatment. The as‐prepared vacancy‐CoS @C offers ultrahigh (285.1 mAh g −1 200 A ), excellent long‐cycle stability (389.2 40 after 10000 cycles), outperforming all reported transition sulfides‐based SIBs. Both ex‐situ characterizations provide strong evidence evolution mechanism phases stable solid‐electrolyte interface (SEI) on surface. functional theory calculations show constructing reasonable significantly increase electronic conductivity. Notably, assembled @C//Na 3 V (PO 4 ) /C full‐cell shows capacity 226.2 400 cycles 2.0 , confirming material's practicability.

Language: Английский

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

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

Published: Oct. 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.

Language: Английский

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Revealing the fast reaction kinetics and interfacial behaviors of CuFeS2 hollow nanorods for durable and high-rate sodium storage

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 990 - 1000

Published: Oct. 30, 2024

Language: Английский

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A Universal Interfacial Reconstruction Strategy Based on Converting Residual Alkali for Sodium Layered Oxide Cathodes: Marvelous Air Stability, Reversible Anion Redox, and Practical Full Cell

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(47), P. 32317 - 32332

Published: Nov. 16, 2024

Mn-based layered oxide cathodes have attracted widespread attention due to high capacity and low cost, however, poor air stability, irreversible phase transitions, slow kinetics inhibit their practical application. Here, we propose a universal interfacial reconstruction strategy based on converting residual alkali tunnel Na0.44MnO2 for addressing the above mentioned issue simultaneously, using O3 NaNi0.4Fe0.2Mn0.4O2@2 mol % (NaNFM@NMO) as prototype material. The optimized material exhibits an initial energy density comparable with lithium-ion batteries. reversible anionic redox behavior charge compensation mechanism of NaNFM@NMO were analyzed verified by soft X-ray absorption spectrum in situ spectrum. Due intrinsic stability structure, excellent highly structure evolution cathode are achieved, which confirmed contact angle test, rigorous aging diffraction. More importantly, demonstrates great match nonpresodiated hard carbon anode shows electrochemical performance full cell. Additionally, such could be also applied modify P2-type cathodes, showing superior universality good prospects industrialized production. Overall, proposed improve while remaining bulk stable simultaneously will open up whole new field optimization other electrode materials.

Language: Английский

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Layered oxide cathodes: A comprehensive review of characteristics, research, and development in lithium and sodium ion batteries

Carbon Neutralization, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 19, 2024

Abstract Layered oxide materials are widely used in the field of energy storage and conversion due to their high specific energy, efficiency, long cycle life, safety. Herein, We summarize latest research progress layered metal cathode from three aspects: challenges faced, failure mechanisms, modification methods. also compare characteristics lithium‐based oxides sodium‐based oxides, predict future development directions. The for sodium‐ion batteries lithium‐ion exhibit overall structural operational similarities. There some differences, such as lattice parameters application extent. Sodium‐ion battery need explore new address instability issues, while require finding alternative improving production efficiency. Future both types include enhancing capacity performance, elucidating deep reducing costs, resource sustainability. should focus on balancing stability charge cut‐off voltage meet growing demand applications.

Language: Английский

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Reviving Sodium Tunnel Oxide Cathodes Based on Structural Modulation and Sodium Compensation Strategy Toward Practical Sodium‐Ion Cylindrical Battery

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(41)

Published: Sept. 2, 2024

Abstract As a typical tunnel oxide, Na 0.44 MnO 2 features excellent electrochemical performance and outstanding structural stability, making it promising cathode for sodium‐ion batteries (SIBs). However, suffers from undesirable challenges such as surface residual alkali, multiple voltage plateaus, low initial charge specific capacity. Herein, an internal external synergistic modulation strategy is adopted by replacing part of the Mn with Ti to optimize bulk phase construct Ti‐containing epitaxial stabilization layer, resulting in reduced + transport kinetics improved water/air stability. Specifically, 0.85 0.15 O using water‐soluble carboxymethyl cellulose binder can realize capacity retention rate 94.30% after 1,000 cycles at 2C, stability further verified kilogram large‐up applications. In addition, taking advantage rich content Prussian blue analog (PBA), PBA‐Na 1‐x x composites are designed compensate insufficient oxide matched hard carbon achieve preparation coin full cell 18650 cylindrical battery satisfactory performance. This work enables application oxides SIBs first time promotes commercialization SIBs.

Language: Английский

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Advanced pseudocapacitive lithium titanate towards next-generation energy storage devices

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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A “grafting technique” to tailor the interfacial behavior of hard carbon anodes for stable sodium-ion batteries

Energy & Environmental Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A novel strategy for grafting a highly fluorinated molecule on the HC surface (FHC), which functionally enhances reversible sodium storage behavior in slope region and contributes to architecture of robust NaF-rich SEI.

Language: Английский

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A Phase‐Transition–Free Sodium Vanadium Phosphate Cathode via Medium‐Entropy Engineering for Superior Sodium Ion Batteries

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

Published: Jan. 15, 2025

Abstract Na 3 V 2 (PO 4 ) , based on multi‐electron reactions between 3+ /V 4+ 5+ is a promising cathode material for SIBs. However, its practical application hampered by the inferior conductivity, large barrier of and stepwise phase transition. Herein, these issues are addressed constructing medium‐entropy (Na 3.2 1.1 Ti 0.2 Al Cr Mn Ni 0.1 ME‐NVP) with strong ME─O bond highly occupied Na2 sites. Benefiting from effect, ME‐NVP manifests phase‐transition–free reaction mechanism, two reversible plateaus at 3.4 (V 4.0 ), small volume change (2%) during + insertion/extraction processes, as confirmed comprehensive in/ex situ characterizations. Moreover, kinetics analysis illuminates superior diffusion ability ME‐NVP. Thus, realizes remarkable rate capability 67 mA h g −1 50C long‐term lifespan over 10 000 cycles (capacity retention 81.3%). Theoretical calculations further illustrate that weak binding ion in channel responsible rapid diffusion, accounting kinetics. rigid MEO 6 octahedral feasible rearrangement ions can suppress transition, thus endowing an ultrastable cathode. This work highlights significant role engineering advancing output voltage, cycling stability, polyanionic cathodes.

Language: Английский

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Chromium-doped tunnel-structured VO2(B) nanorods as high-capacity and stable cathode materials for aqueous zinc-ion batteries

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 114, P. 115826 - 115826

Published: Feb. 14, 2025

Language: Английский

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