Regulation of Coordination Chemistry for Ultrastable Layered Oxide Cathode Materials of Sodium‐Ion Batteries

Advanced Materials, Год журнала: 2024, Номер 36(16)

Опубликована: Янв. 9, 2024

Abstract Layered transition‐metal (TM) oxide cathodes have attracted growing attention in sodium‐ion batteries (SIBs). However, their practical implementation is plagued by Jahn–Teller distortion and irreversible cation migration, leading to severe voltage decay structure instability. Herein, O3‐Na 0.898 K 0.058 Ni 0.396 Fe 0.098 Mn Ti 0.092 O 2 (KT‐NFM) reported as an ultrastable cathode material via multisite substitution with rigid KO 6 pillars flexible TiO octahedra. The induce contracted TMO slabs strong Coulombic repulsion inhibit Ni/Fe migration; incorporation reinforces the hybridization of Ni(3deg*)‐O(2p) mitigate undesired O3–O'3 phase transition. These enable reversible redox +↔Ni 3 . 20 + +↔Fe 3.69 for 138.6 mAh g −1 cycles >90% capacity retention after 2000 a pouch cell KT‐NFM||hard carbon. This will provide insights into design layered materials beyond.

Язык: Английский

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Oxygen vacancy chemistry in oxide cathodes

Chemical Society Reviews, Год журнала: 2024, Номер 53(7), С. 3302 - 3326

Опубликована: Янв. 1, 2024

This review focuses on the chemical thermodynamics and reaction kinetics of intrinsic anionic redox-mediated oxygen vacancies in oxide cathodes.

Язык: Английский

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Sodium layered oxide cathodes: properties, practicality and prospects

Chemical Society Reviews, Год журнала: 2024, Номер 53(15), С. 7828 - 7874

Опубликована: Янв. 1, 2024

This review depicts a broad picture of fundamental electrochemical properties, challenges in practical use, improvement strategies and future prospects Na layered oxides, attempting to offer insights into design high-performance cathodes.

Язык: Английский

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Accessing the O Vacancy with Anionic Redox Chemistry Toward Superior Electrochemical Performance in O3 type Na‐Ion Oxide Cathode

Advanced Functional Materials, Год журнала: 2024, Номер 34(32)

Опубликована: Апрель 13, 2024

Abstract Anionic redox chemistry is now viewed as the effective paradigm of improving capacity layered oxide materials in Sodium‐ion battery. In this study, O3‐type NaLi 0.18 Co 0.23 Ru 0.59 O 2 (NLCR) with ability successfully synthesized via a facile solid‐state synthesis method. By manipulating calcinate atmosphere air and argon (sort by NLCR‐Air NLCR‐Ar respectively), large amount vacancy introduced cathode. sufficient exhibited superior rate performance which showed 87.7% retention after 1000 cycles at 20 C. Both activation properties supported soft X‐ray absorption spectroscopy (sXAS). Nevertheless, in‐situ diffraction sXAS studies disclosed can promote reversible phase transition effectively suppress irreversible upon cycling. These are further theoretical study suggested fast kinetic Na diffusion less electron agglomeration around atom for vacancy.The research proposed modification strategy extraordinary property within cathode offered novel insight into understanding anionic mechanism thus provide guidance material design advanced energy storage systems.

Язык: Английский

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Entropy Tuning Stabilizing P2‐Type Layered Cathodes for Sodium‐Ion Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(24)

Опубликована: Янв. 21, 2024

Abstract The P2‐type layered transition metal oxide cathodes confront formidable challenges, including irreversible deleterious phase transitions, metals migration, and sluggish Na + diffusion kinetics, which hamper their rapid commercial application in sodium ion batteries (SIB). In this work, an entropy tuning with dual‐site substitution strategy is proposed to address the aforementioned issues. tailored [Na 0.67 Zn 0.05 ]Ni 0.22 Cu 0.06 Mn 0.66 Ti 0.01 O 2 (NZNCMTO) cathodes, strategic incorporation of ions serves occupy sites, intentionally disrupting Na/vacancy ordering establishing a reinforcing “pillar” effect within framework. Furthermore, for Ni bolsters covalent bonding lattice oxygen, thereby impeding migration leading near‐zero strain structural evolution during charge discharge process. Density functional theory calculations confirmed that entropy‐tuned NZNCMTO substantially lowered energy barrier improved electronic conductivity. Consequently, cathode exhibits impressive high practical capacity 91.54 mAh g −1 at rate 10 C, along outstanding cycling stability, maintaining near 100% retention over 500 cycles current density C. This work presents innovative blueprint designing high‐performance sodium‐ion battery materials.

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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Revealing the Nature of Binary‐Phase on Structural Stability of Sodium Layered Oxide Cathodes

Advanced Materials, Год журнала: 2024, Номер 36(29)

Опубликована: Май 18, 2024

The emergence of layered sodium transition metal oxides featuring a multiphase structure presents promising approach for cathode materials in sodium-ion batteries, showcasing notably improved energy storage capacity. However, the advancement cathodes with structures faces obstacles due to limited understanding integrated structural effects. Herein, effects by an in-depth structure-chemistry analysis developed system Na

Язык: Английский

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Unraveling the functioning mechanism of fluorine-doping in Mn-based layered oxide cathodes toward enhanced sodium-ion storage performance

Energy storage materials, Год журнала: 2024, Номер 69, С. 103377 - 103377

Опубликована: Апрель 3, 2024

Язык: 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, Год журнала: 2024, Номер 146(47), С. 32317 - 32332

Опубликована: Ноя. 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.

Язык: Английский

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Facilitating an Ultrastable O3-Type Cathode for 4.5 V Sodium-Ion Batteries via a Dual-Reductive Coupling Mechanism

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(20), С. 13924 - 13933

Опубликована: Май 9, 2024

O3-type layered oxides for sodium-ion batteries (SIBs) have attracted extensive attention due to their inherently sufficient Na content, which been considered as one of the most promising candidates practical applications. However, influenced by irreversible oxygen loss and phase transition O3–P3, cathodes are always limited low cutoff voltages (typically <4.2 V), restraining full release capacity. In this study, we originally propose a dual-reductive coupling mechanism in novel Na0.8Li0.2Fe0.2Ru0.6O2 cathode with suppressed O3–P3 transition, aiming at improving reversibility redox high voltage regions. Consequently, thanks formation strong covalent Fe/Ru–(O–O) bonding inhibited slab gliding from O P phase, delivers preeminent cyclic stability among numerous within 4.5 V (a capacity retention 95.4% after 100 cycles 1.5–4.5 V). More importantly, HAADF-STEM 7Li solid-state NMR results reveal absence metal migration presence reversible Li during cycling, further contributes improved structural robustness cathode. This study proposes an innovative strategy boost anionic achieve stable high-voltage oxides, promoting development SIBs.

Язык: Английский

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