Trace Cu Doping Enabled High Rate and Long Cycle Life Sodium Iron Phosphate Cathode for Sodium-Ion Batteries

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Na

Language: Английский

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Multivalent Cation Incorporated into Manganese‐Iron Based NASICON Cathodes for High Voltage Sodium‐Ion Batteries

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

Published: Aug. 9, 2024

Abstract Na 4 Mn 1.5 Fe (PO ) 2 P O 7 (NMFPP), with its low cost and high energy density, is essential for accelerating the commercialization of sodium‐ion batteries. However, practical application limited by serious voltage hysteresis detrimental Jahn‐Teller distortions. Herein, a operating superior stable Nb‐doped NMFPP fewer intrinsic anti‐site defects are elaborately designed reconstruction crystal lattice electronic distribution. By introducing higher charge density Nb─O bonds, lengths Mn‐O bonds shortened, enhancing stability. As result, volume contracted during + extraction/insertion decreased niobium‐modified (Mn 0.5 2.94 Nb 0.06 , mitigating distortion from effect increasing capacity retention after 1000 cycles 57.5% to 82.3%. More importantly, delayed 2+ involvement in redox reactions significantly reduced, raising average 3.32 3.64 V overall 13%. This study opens new avenues develop advanced battery cathode materials long calendar life storage.

Language: Английский

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Insights into iron-based polyanionic cathodes for scale- energy storage

Energy storage materials, Journal Year: 2024, Volume and Issue: 72, P. 103722 - 103722

Published: Aug. 30, 2024

Language: Английский

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Multifunctional-Element doping of NASICON-Structured cathode enables High-Rate and stable sodium storage

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 497, P. 154304 - 154304

Published: July 27, 2024

Language: Английский

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Vacancy and Low‐Energy 3p‐Orbital Endow Na₄Fe₃(PO₄)₂(P₂O₇) Cathode with Superior Sodium Storage Kinetics

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

Published: Jan. 5, 2025

Abstract Iron‐based phosphate Na 4 Fe 3 (PO ) 2 (P O 7 (NFPP) has been regarded as the most promising cathode for sodium‐ion batteries (SIBs) thanks to its cost‐effectiveness and eco‐friendliness. However, it is in a predicament from intrinsic low ionic/electronic conductivity, becoming great challenge practical application. Herein, significant roles of low‐energy 3p ‐orbital transition metal vacancies are emphasized facilitating charge rearrangement reconstructing ion‐diffusion channels, perspectives crystallography electron interaction first time, modification mechanism fully explored by various characterizations theoretical calculations. As proof this concept, designed 2.85 Al 0.1 (NF A PP) delivers prominent electrochemical performance, achieving high energy density (≈350 Wh kg⁻¹), superior kinetics (62 mAh g⁻¹ at 10 g⁻¹), excellent power (23 kW kg⁻¹, 143 extraordinary cycling stability (with negligible attenuation after 000 cycles). This work provides brand‐new perspective designing ultra‐endurable high‐rate polyanion cathodes.

Language: Английский

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Stabilizing the solid-solution sodium storage in Cr-substituted Na3V2(PO4)3 cathode for aqueous sodium-ion batteries with long-term stability

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

Published: Jan. 1, 2025

Language: Английский

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Lattice Regulation Boosts Working Voltage and Energy Density of Na_3.12Fe_2.44(P₂O₇)₂ Cathode for Sodium‐Ion Batteries

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

Published: Feb. 9, 2025

Abstract Pyrophosphate Na 3.12 Fe 2.44 (P 2 O 7 ) (NFPO) has triggered widespread attention due to its high safety and robust framework. However, it suffers from low energy density the limited specific capacity partial voltage plateau (≈2.5 V vs + /Na). Regulating such can be a promising way increase of NFPO. As revealed by systematic characterizations theoretical calculations, low‐voltage results Fe1 site (corner‐sharing mode) redox reaction accompanied Na4 insertion/extraction process. Accordingly, in this work, precise Ti 3+ doping strategy is proposed selectively occupy based on effect, thus boosting 277.5 307.7 Wh kg −1 improved reversible (109.8 mAh g regulated plateau. Reversible structural evolution with very tiny volume variation (3%) strengthened local environment (Ti─O bonds) promises outstanding cycling durability (90.3% retention over 4000 cycles). Moreover, fast kinetics diffusion barriers achieved introducing contribute excellent rate capability. This lattice regulation enables NFPO cathode superior performance provide deep guidelines for designing advanced polyanion cathodes.

Language: Английский

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Challenges and Strategies for Multi‐Electron Reactions in High‐Energy Phosphate‐Based Cathodes for Sodium‐Ion Batteries

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

Published: Feb. 16, 2025

Abstract Sodium‐ion batteries (SIBs) have been considered as promising candidates for large‐scale energy storage systems and low‐speed electric vehicles due to abundant sodium resources low cost. Phosphate‐based cathodes stand out their high voltages, structural stability, superior safety, etc. However, large molecular weight limits the overall capacity, compromising density practical applications. Recent advancements in multi‐electron reactions based on transition metal (TM) ions provide a pathway achieve both stability. This review discusses fundamental principles behind of phosphate‐based from perspectives electrochemistry materials science. The key factors, such conservation matter charge, thermodynamic, kinetic feasibility, are addressed activating regulating reactions, aiming capacity exceeding 170 mAh g −1 . current progress NASICON‐type phosphate is summarized, challenges associated with pyrophosphate mixed analyzed reactions. Finally, future development high‐energy provided.

Language: Английский

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Lanthanum-doped Na4Fe3(PO4)2P2O7/C as cathode materials in sodium-ion batteries: Enhanced ion diffusion kinetics and embedded pseudocapacitance

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 635, P. 236531 - 236531

Published: Feb. 16, 2025

Language: Английский

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Fabrication of Onion-Like Carbon Frameworks and Uniform Carbon Coating Layer at Na₄Fe₃(Po₄)₂P₂O₇ for Synergistically Improving Conductivity and Structural Stability

Published: Jan. 1, 2025

Language: Английский

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