Pre‐Doping of Dual‐Functional Sodium to Weaken Fe─S Bond and Stabilize Interfacial Chemistry for High‐Rate Reversible Sodium Storage

Advanced Energy Materials, Год журнала: 2024, Номер 14(30)

Опубликована: Май 22, 2024

Abstract Ferrous sulfides with the high theoretic capacity are promising anode for sodium ion batteries. However, fading and inferior rate capability still hinder their practical application. In this work, Na‐doped Fe 7 S 8 microrods cationic vacancies weakened Fe─S bond constructed through a facile scalable sulfurized route. The experimental results combined theoretical analysis thoroughly reveal generation of strength induced by doping, which modulates energy band structure , provides more active sites, accelerates sodiation/desodiation reaction kinetics, simultaneously. Moreover, pre‐doping delivers strong guiding effect on formation thin stable solid electrolyte interface films. As result, optimal sample exhibits excellent storage performance, including reversible (674 mAh g −1 after 200 cycles at 0.5 A 503 1500 10 ), superior capability, increased initial coulombic efficiency. Furthermore, full cell paired commercial Na 3 V 2 (PO 4 ) also displays outstanding cyclic stability 95.9% retention 100 cycles.

Язык: Английский

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Optimization Strategies of Na3V2(PO4)3 Cathode Materials for Sodium-Ion Batteries

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Окт. 4, 2024

Abstract Na 3 V 2 (PO 4 ) (NVP) has garnered great attentions as a prospective cathode material for sodium-ion batteries (SIBs) by virtue of its decent theoretical capacity, superior ion conductivity and high structural stability. However, the inherently poor electronic sluggish diffusion kinetics NVP give rise to inferior rate performance unsatisfactory energy density, which strictly confine further application in SIBs. Thus, it is significance boost sodium storage material. Up now, many methods have been developed optimize electrochemical In this review, latest advances optimization strategies improving are well summarized discussed, including carbon coating or modification, foreign-ion doping substitution nanostructure morphology design. The highlighted, involving Na, V, PO 3− sites, include single-site doping, multiple-site single-ion multiple-ion so on. Furthermore, challenges prospects high-performance also put forward. It believed that review can provide useful reference designing developing toward large-scale

Язык: Английский

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Biomass-derived carbon dots: synthesis, modification and application in batteries

Chemical Science, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Biomass-derived carbon dots (BCDs) have attracted considerable attention for their promising attributes, including low toxicity, excellent solubility, biocompatibility, and eco-friendliness. Their rich surface chemistry impressive photoluminescent properties sparked widespread research interest, particularly in areas such as sensing biomedicine. However, the potential applications of BCDs energy sector, especially electrochemical storage batteries, received scant review focus. This article systematically consolidates selection sources, synthesis methods, modification strategies, corresponding characterization techniques BCDs. Application strategies batteries are explored, with underlying connection between role structural being analyzed, providing comprehensive insights from to application. Furthermore, a preliminary discussion is initiated on current limitations material regulation design within research, avenues enhancement proposed.

Язык: Английский

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Carbon decorated Na₃V₂(PO₄)₃ Nanoparticles as a High-rate-capability Cathode for Fast Chargeable Sodium-ion Batteries

Electrochimica Acta, Год журнала: 2025, Номер unknown, С. 145945 - 145945

Опубликована: Фев. 1, 2025

Язык: Английский

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Synergistic effect of holey graphene and CoSe2-NiSe2 heterostructure to enhance fast Na-ion transport

Chemical Engineering Journal, Год журнала: 2024, Номер 498, С. 155353 - 155353

Опубликована: Авг. 31, 2024

Язык: Английский

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Advances and Challenges of Porous Structure on Solid–Liquid Interfaces in Polyanionic Sodium‐Ion Batteries

Advanced Energy Materials, Год журнала: 2024, Номер 14(42)

Опубликована: Авг. 21, 2024

Abstract The sodium‐ion batteries (SIBs) are expected to be the substitute for lithium‐ion (LIBs) because of their low cost, high abundance, and similar working mechanism. Among them, polyanion‐type electrodes show great application prospects due superior ion diffusion channels structural stability. However, there still many scientific issues that need thoroughly investigated, especially formation mechanism, stability, interface impedance solid–liquid interfaces. Therefore, it is significance systematically study mechanism reaction electrochemical behavior, promote further practical SIBs. Fortunately, polyanionic can effectively improve transport dynamics interfacial stability interfaces through constructing porous structure, surface modification, electrolyte strategies, thus improving cycle rate performance. This review discusses characteristics mechanisms electrode/electrolyte (EEI), as well behavior in structures with different dimensions. Furthermore, this covers materials kinetics EEI. In particular, highlights various strategies employed comprehend interplay among chemistry, preparation methods, ultimately affect properties

Язык: Английский

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Win–win strategy: zinc-ion anchoring crosslinked hydrogels and regulating electronic structure to achieve V³⁺/V⁴⁺/V⁵⁺ redox reaction of Na₃V₂(PO₄)₃ with high thermal stability and zero strain characteristics

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(30), С. 19422 - 19439

Опубликована: Янв. 1, 2024

Zinc-ion anchoring crosslinked hydrogels and regulating electronic structure to achieve high performance of Na 3 V 2 (PO 4 ) .

Язык: Английский

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Entropy Driving “Quasi‐Zero Strain” Stepwise Multicationic Redox Chemistry Toward a High‐Performance NASICON‐Cathode for Na‐Ion Batteries

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Abstract Achieving multicationic redox reactions with low lattice strain accumulation upon repeated sodiation/desodiation processes is pivotal for developing high‐energy and long‐durability Na superionic conductor (NASICON)‐type cathodes but still a formidable task. Herein, novel NASICON‐structured high‐entropy 3.4 VMn 0.2 Fe Al 0.3 Cr (PO 4 ) 3 (HE‐NVMFACP) cathode delicately devised, where the entropy‐driving stepwise 2+ /Fe 3+ , V /V 4+ 5+ Mn /Mn /Cr couples not only trigger multielectron transfer chemistry, also alleviate accumulation. Consequently, HE‐NVMFACP exhibits high reversible capacity of 151.3 mAh g −1 an admirable energy density 520.5 Wh kg impressive “quasi‐zero strain” behavior (1.33% cell volume change) during whole charge‐discharge process. Meanwhile, excellent rate capability 90.4 at 50 C ultralong cycling life 91.9% retention after 5000 cycles are demonstrated. Advanced in situ/ex situ techniques reveal complete solid‐solution highly mechanism + uptake/release, rapid electrode process kinetics confirmed by systematic electrochemical measurements theoretical computations. Furthermore, HE‐NVMFACP||hard carbon Na‐ion full batteries assembled both coin pouch configurations, manifesting bright application prospects. The present strategy provides invaluable perspectives designing long‐life NASICON‐cathodes sodium‐ion batteries.

Язык: Английский

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Promoting Robust and Rapid Na‐Ion Storage of Molybdenum‐Based Sulfide via Rational Hetero and Hollow Structure Design

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Molybdenum disulfide (MoS 2 ), characterized by its two‐dimensional structure and high theoretical specific capacity, is considered a prospective anode of Na‐ion battery. However, the cycling rate capabilities are hampered sluggish charge transfer kinetics poor structural stability. To overcome issues, most efforts have been focused on optimizing MoS . Nevertheless, rationally designing that can present rapid durable storage while ensuring large remains challenges. Herein, /MnS heterostructure featuring sphere‐like hollow morphology designed according to Ostwald ripening process Kirkendall effect. This construction effectively establish an interfacial built‐in electric field activated MnS , which exhibit P‐type N‐type semiconductor characteristics, respectively, thereby promoting electrochemical kinetics. Moreover, excellent stability after repeated (de)sodiation processes remarkably achieved thanks robust design, significantly achieving outstanding tolerance changes. Consequently, delivers capacity (594.8 mAh g −1 at 0.1 A superior performance (up 100 ultrastable capability (30 000 cycles with ≈81.4% retention). The work affords effective optimization tactic develop high‐performance conversion‐type electrodes for alkali‐ion batteries.

Язык: Английский

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Accelerating Electrochemical Responses of Na₄VMn(PO₄)₃ via Bulk‐Defects and Architecture Engineering for High‐Performance Sodium‐Ion Batteries

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Апрель 17, 2025

Abstract Manganese‐based NASICON‐type Na 4 VMn(PO ) 3 (NVMP) has captured widespread attention in sodium‐ion batteries (SIBs) due to its abundant reserves and high operating voltages. However, the low intrinsic conductivity detrimental Jahn–teller (J–T) effect impedes electron ion transfer, leading rapid structural degradation capacity decay. Herein, a facile multiscale coupling strategy is proposed synthesize nanosheet‐stacked rods (NVMP‐NSRs) with rational defects for improving stability, thus accelerating electrochemical responses. Localized unsaturated coordination states around vanadium atoms NVMP‐NSRs are also regulated, further facilitating + diffusion relieved volume expansion unique architecture design. Density functional theory (DFT) calculations reveal highly rearranged interfacial charges, yielding benefits reducing energy barriers of migration. The innovative appropriate bulk exhibit considerable discharge (120.1 mAh g −1 at 0.5C), high‐rate performance (70.9 30C), negligible decay (3000 cycles 20C). Moreover, assembled NVMP‐NSRs//hard carbon full cells demonstrate density 391.1 Wh kg excellent cyclic stability (91.2% after 100 1C). this work offers new avenues design high‐performance electrode materials toward fast responses robust stability.

Язык: Английский

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