P2-Na0.67Mn0.7Ni0.2Co0.1O2 stabilized by optimal active facets for sodium-ion batteries

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 684, P. 523 - 530

Published: Jan. 7, 2025

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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Enhancing Structural Reversibility of O3-Type Layered Na0.9cu0.12ni0.33mn0.4ti0.15o2 Cathode for Sodium-Ion Batteries Via High-Entropy Effect Combined with Interface Reconstruction of Tib2 Coating Layer

Published: Jan. 1, 2025

O3-type layered oxides are considered as one of the most promising cathode materials for sodium-ion batteries (SIBs) owing to their high initial sodium content, reversible capacity, mature synthesis process, and low production cost. However, adverse phase transition highly air-sensitive issues result in unsatisfactory cycle life poor processing properties, limiting further commercialization. Herein, we prepare a high-entropy metal oxide modified by TiB2 coating layer, which displays increasing structural stability due increase entropy. The layer prevents direct contact between electrolyte electrode, suppresses unfavorable side reaction with electrolyte. Moreover, induces part boron ions (B2−) doping into oxygen CNMT, expanding ion diffusion channels. Consequently, designed Na0.9Cu0.12Ni0.33Mn0.4Ti0.15O2@TiB2 (CNMT@TB) 1 wt% exhibits significantly improvement cycling (capacity retention 91.58% after 200 cycles at 100 mA g−1 93.90% 250 500 g−1) compared pristine CNMT (63.88% 80.07% g−1). This work provides insightful guidance simultaneously enhancing electrochemical performance batteries.

Language: Английский

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Structure stability modulation of P2-type layered oxide cathodes through the synergetic effect of co-doping strategy

Applied Surface Science, Journal Year: 2025, Volume and Issue: 688, P. 162354 - 162354

Published: Jan. 10, 2025

Language: Английский

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Controllable Construction of CeO₂ Shells with a Nanoscale Thickness to Enhance the High-Voltage Electrochemical Performance of Ni-Rich Cathodes

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

Published: Feb. 2, 2025

Language: Английский

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Surficial and Interior Incorporation of Borates Mitigating the Inherent Jahn–Teller Distortion in a P2 Mn‐Rich Layered Cathode for Na‐Ion Batteries

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

Published: Feb. 25, 2025

Abstract Layered Mn‐rich materials are regarded as a promising cathode candidate for Na‐ion batteries (NIBs) owing to its environmentally friendly nature, decent theoretical capacities, and relatively low cost. However, the irreversible phase transition originating from Jahn–Teller distortion attributed high‐spin Mn 3+ (t 2g 3 eg 1 ) during deep sodiation triggers serious structural degradation followed by capacity decay. Herein, incorporation of borate‐anion groups either into bulk (BO 3− or on surface 4 5− successfully modulates local‐structure environment P2‐type layered cathode, changing lattice parameters valence states metals inside. The optimized Na 0.734 Ni 0.207 0.694 Co 0.098 (B 0.063 O x )O 2‐x (B‐NCM) can remit P2‐P’2 mitigating inherent MnO 6 octahedra, allowing reversible with reduced strain even after 1.5 V. B‐NCM exhibits excellent retention, reaching 82.02% 200 cycles. In addition, modulated local structure inside helps relieve + /vacancy ordering, enhancing diffusivity rate capability compared pristine NCM analo. This work demonstrates novel approach based glassy anion both improve electrochemical properties materials.

Language: Английский

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Construction of La-Doped BiFeO3 ferroelectric Heterojunction coatings to enhance the performance of Lithium-Rich Manganese-Based cathode materials

Applied Surface Science, Journal Year: 2025, Volume and Issue: unknown, P. 162951 - 162951

Published: March 1, 2025

Language: Английский

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Medium-entropy P2-type layered metal oxide cathode demonstrating complete solid-solution behavior for improved Na-ion battery performance

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137744 - 137744

Published: April 1, 2025

Language: Английский

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Enhancing structural reversibility of O3-type layered Na0.9Cu0.12Ni0.33Mn0.4Ti0.15O2 cathode for sodium-ion batteries via interface reconstruction of TiB2 coating layer

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180715 - 180715

Published: May 1, 2025

Language: Английский

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Jahn‐Teller Effect in Sodium Layered Oxide Cathodes: Inducement Mechanisms, Mitigation Strategies, and Rational Utilizations

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

Published: May 2, 2025

Abstract The sodium‐layered transition metal oxides (Na x TMO 2 ) are regarded as the promising cathode for sodium‐ion batteries (SIBs) relying on their high theory capacity and cost‐effectiveness. Nevertheless, intrinsic lattice distortions caused by Jahn‐Teller active ions significantly degrade structural stability of Na , generally resulting in unsatisfactory electrochemical properties. In this review, begins introducing inducement mechanisms effect (TM) ions. Subsequently, restraining strategies well corresponding using element doping/substitutions, surface reconstructions, polyphase symbiosis, TM/oxygen/Na + vacancy manipulations summarized detail. Specifically, influences such mitigation deformation properties, phase evolution behaviors, TM dissolution characteristics, crystal comprehensively discussed. Furthermore, sensible utilization distortion is to build cathodes with and/or repaid ion transport kinetics well. end, challenges faced amelioration methods overviewed put forward research directions future trenchantly constrain 6 octahedron deformation. This work will provide more perceptions further studies SIBs.

Language: Английский

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