Elucidating the Structural Evolution of O3-type NaNi_1/3Fe_1/3Mn_1/3O₂: A Prototype Cathode for Na-Ion Battery

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(46), P. 31860 - 31872

Published: Nov. 7, 2024

Extending the depth-of-charge (DoC) of layered oxide cathode presents an essential route to improve competitiveness Na-ion battery versus commercialized LiFePO

Language: Английский

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High entropy stabilized O3-type NaNi0.3Fe0.2Mn0.2Ti0.15Sn0.15O2 cathode material for sodium-ion batteries

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 160309 - 160309

Published: Feb. 1, 2025

Language: Английский

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Nonflammable Electrolyte Interfacial and Solvation Chemistry for High‐Voltage Sodium Metal Batteries

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

Published: March 5, 2025

Abstract High‐voltage sodium metal batteries exhibit excellent advantages in low cost and high energy density. However, the poor compatibility of traditional electrolyte with (Na) anode high‐voltage cathode leads to interfacial instability potential flammable risks. In this work, a nonflammable is developed address cycling stability 4.7 V battery by constructing electrode–electrolyte interphases perchlorate (NaClO 4 ) additive. The NaClO additive not only enables efficient Na plating/stripping an average Coulombic efficiency 97.1% Na||Cu cells, but also enhances Na||Na 3 2 (PO O F capacity retention 97.9% after 200 cycles. superior performance attributed ion‐conductivity solid/cathode interphases, which are tuned solvation shell .

Language: Английский

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Dynamic Lock‐And‐Release Mechanism Enables Reduced ΔG at Low Temperatures for High‐Performance Polyanionic Cathode in Sodium‐Ion Batteries

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

Published: Oct. 24, 2024

Abstract Low‐temperature synthesis of polyanionic cathodes for sodium‐ion batteries is highly desirable but often plagued by prolonged reaction times and suboptimal crystallinity. To address these challenges, a novel self‐adaptive coordination field regulation (SACFR) strategy based on dynamic lock‐and‐release (DLR) mechanism introduced. Specifically, urea used as DLR carrier during synthesis, which dynamically “locks” “releases” vanadium ions controlled release, simultaneously “locking” H + to enhance phosphate group thereby creating that can intelligently respond real‐time demands the system. This behavior contributes both an improvement in kinetics significant reduction Gibbs free energy change ( ΔG ). As result, kinetic efficiency thermodynamic spontaneity are greatly enhanced, enabling efficient high‐crystalline Na 3 V 2 O (PO 4 ) F (NVOPF) at 90 °C within just hours. The as‐prepared NVOPF cathode exhibits exceptional rate performance ultra‐stable cycling stability across broad temperature range. Furthermore, successful kilogram‐scale underscores practical potential innovative strategy. work pioneers chemistry providing transformative insights into material design.

Language: Английский

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The latest research progress on closed pore hard carbon for sodium-ion batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 102, P. 114209 - 114209

Published: Oct. 18, 2024

Language: Английский

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Single Crystal Sodium Layered Oxide Achieves Superior Cyclability at High Voltage

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

Published: Nov. 22, 2024

Abstract High‐energy density and long‐lifespan have been a long‐standing target toward the high‐voltage sodium batteries requirement. It is important essential to explore cathode materials, which can realize high voltage stability. Large‐sized single‐crystal O3‐typed Na[Ni 0.3 Mn 0.35 Cu 0.1 Ti 0.25 ]O 2 thus designed successfully synthesized by molten salt‐assist calcination method. The high‐orientation crystal lattice without grain boundaries cannot only accelerate ion diffusion rate electronic conductivity, but also minimize occurrence of phase transitions mechanical stress address oxygen loss. Meanwhile, large‐exposed stable (003) plane alleviate electrolyte attacking corrosions, forming interface structure. obtained material exhibits capacity retention rates 84.4% 90.1% after 200 cycles at 0.5 C 1 C, respectively. Once coupled with hard carbon as anode, full‐cell retains 81.5% 1000 C.

Language: Английский

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Suppressing P2-O2 phase transition by activating highly reversible anionic redox reaction in P2 layered oxide cathode

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158662 - 158662

Published: Dec. 1, 2024

Language: Английский

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Synergistically Boosted Na⁺ Migration and Deep Desodiation Stability of NASICON Cathode via High Entropy Regulation

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

Published: Jan. 10, 2025

Abstract Mn‐containing sodium superionic conductor (NASICON) compounds have shown considerable potential as cathode for sodium‐ion batteries (SIBs) owing to higher working voltage (V 5+ /V 4+ : 3.9 V), lower cost, and toxicity compared full vanadium‐based NASICON Na 3 V 2 (PO 4 ) . Taking 3.3 1.7 Mn 0.3 (NVMP) an example, its practical application is still restricted by poor electronic conductivity, sluggish intrinsic + diffusion, high‐voltage stability. In this work, a high entropy strategy proposed develop 1.613 (Cr, Fe, Co, Ni, Zr) 0.1 (HE‐NVMP) not only enabling more rapid migration but also significantly improving deep desodiation Based on theoretical calculations experimental findings, such modification can efficiently alter the coordination environments of both V/Mn sites reducing diffusion energy barrier, increasing occupancy at Na(2) sites, consolidating structure Thus, obtained HE‐NVMP delivers superior high‐rate capability (91.7 mAh g −1 up 50 C excellent cycling performance (capacity retention: 81.2%) after 10 000 cycles 20 cutoff 4.1 V. More importantly, exhibits storage properties (4.5 V) with electrochemical polarization 75% reduction 1 capacity retention 80.3% 2000 pristine counterpart, indicating great rechargeable overcharge resistance capability.

Language: Английский

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Dual-enhancements of Stability and Wettability in O3-Na0.95Ni1/3Fe1/3Mn1/3O2 Cathodes by Converting Surface Residual Alkali into Ultalthin Na2Ti3O7 Coatings

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

Published: Jan. 1, 2025

Residual-alkali-derived Na 2 Ti 3 O 7 coatings boost electrolyte wettability and electrochemical performance of a layered oxide cathode for sodium-ion batteries.

Language: Английский

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High‐Entropy Configuration Regulating Interlayer Oxygen Charge Toward High‐Voltage and Air‐Stability Layered Cathode in High‐Loading Sodium Ion Full Batteries

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

Published: Feb. 18, 2025

Abstract Revealing interlayer oxygen charge is of great significance in understanding the high‐voltage and air stability sodium layered cathodes, but it currently lacks attention. Particularly, ion full batteries under high cathode loading (≥8 mg cm −2 ) also faces extremely challenges. Here, its mechanism for are revealed a high‐entropy O3‐Na 0.85 Li 0.1 Al 0.02 Sn 0.08 Cu Ti Ni 0.3 Mn O 2 (HEO) cathode, which enables robust high‐cathode‐loading sodium‐ion batteries. The doping effectively maintains transition metal (TM)─O bond covalency, stabilizing charge. stable O─O repulsion avoids structural collapse, realizing P3‐OP2‐P3 reversible phase transition. Moreover, reduced achieves Na layer contraction Na─O enhancement. These features inhibit attack water loss, well stability. Therefore, HEO exhibits good up to 900 cycles 2.0‒4.3 V high‐capacity retention 96.12% after 5 day exposure. pouch cell with ≈16 ≈60 mAh lasts 100 cycles. This work contributes new insights into both cathodes practical

Language: Английский

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