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

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Oct. 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

Language: Английский

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A Medium‐Entropy NASICON Cathode for Sodium‐Ion Batteries Achieving High Energy Density Through Dual Enhancement of Voltage and Capacity

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

Published: March 17, 2025

Abstract Na 3 V 2 (PO 4 ) (NVP) is recognized for its promising commercialization potential as a sodium‐ion battery (SIB) cathode, due to thermodynamic stability and open structure. However, the limited energy density remains major obstacle further advancement of NVP. Herein, medium‐entropy NASICON 3.3 1.4 Al 0.3 (MgCoNiCuZn) 0.06 (NVAMP‐0.3) designed by introducing 3+ , Mg 2+ Co Ni Cu Zn regulate configurational entropy. These NVAMP‐0.3 achieve an elevated average operating voltage (3.33 V) high capacity (138.1 mAh g −1 based on 2.3 + through /V 4+ 5+ multi‐electron reactions. By simultaneously enhancing voltage, exhibits impressive 460 Wh kg . Furthermore, demonstrates excellent low‐temperature tolerance with retention rate 94.6% after 300 cycles at −40 °C. In situ XRD unveils underlying cause unique phenomenon where solid‐solution reaction accounts faster electrochemical kinetics compared redox. DFT calculations indicate that possesses superior electronic conductivity reduced migration barriers. A pouch cell assembled cathode hard carbon anode highly stable cycling (89.3% 200 1 C). This study provides valuable insights into developing NASICON‐type cathodes densities SIBs.

Language: Английский

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Overcoming Kinetic Limitations of Polyanionic Cathode toward High-Performance Na-Ion Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(28), P. 18758 - 18768

Published: July 4, 2024

Polyanionic cathodes have attracted extensive research interest for Na-ion batteries (NIBs) due to their moderate energy density and desirable cycling stability. However, these compounds suffer from visible capacity fading significant voltage decay upon the rapid sodium storage process, even if modified through nanoengineering or carbon-coating routes, leading limited applications in NIBs. Herein, Na

Language: Английский

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Functional carbon dots induced defect configuration entropy strengthening polyanion cathode for ultrafast-charging sodium ion batteries in a wide temperature

Nano Energy, Journal Year: 2024, Volume and Issue: 130, P. 110107 - 110107

Published: Aug. 10, 2024

Language: Английский

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Insights into Tiny High‐Entropy Doping Promising Efficient Sodium Storage of Na₃V₂(PO₄)₂O₂F toward Sodium‐Ion Batteries

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

Published: Oct. 31, 2024

Abstract Both high operation voltage and theoretical capacity promise polyanion‐type fluorophosphate Na 3 V 2 (PO 4 ) O F as a competitive cathode toward high‐energy‐density sodium‐ion batteries (SIBs). However, the intrinsic low kinetic characteristics seriously influence its high‐power property service life. To well address this, creative tiny high‐entropy (HE) doping methodology is purposefully developed to fabricate nanoscale 1.94 (Cr, Mn, Co, Ni, Cu) 0.06 (NVPOF‐HE) advanced materials for SIBs. The grain refinement effect induced by collaborative regulations from polyvinyl pyrrolidone HE heteroatomic reasonably proposed nanosizing particle dimension of NVPOF‐HE. Systematic experiments calculations authenticate that efficiently promotes electronic/ionic transport high‐voltage contribution, weakens lattice expansion over + ‐(de)intercalation processes. Thanks appealing virtues mentioned here, nano NVPOF‐HE, compared single‐ion/dual‐ion/triple‐ion doped cases, achieves even better ‐storage performance in terms both high‐rate capacities long‐term cycling stability. Furthermore, NVPOF‐HE assembled full SIBs deliver materials‐level energy density 463 Wh kg −1 electrochemical stability ≈93.8% retention after 1000 cycles at 5 C rate. More essentially, fundamental insights gained here provide significant scientific technological advancement high‐performance durable polyanionic cathodes next‐generation

Language: Английский

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A high-entropy-designed cathode with V5+-V2+ multi-redox for high energy density sodium-ion batteries

Journal of Energy Chemistry, Journal Year: 2024, Volume and Issue: 97, P. 429 - 437

Published: June 14, 2024

Language: Английский

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Improving upon rechargeable battery technologies: On the role of high-entropy effects

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

An overview of high-entropy strategies for batteries is provided, emphasizing their unique structural/compositional attributes and positive effects on stability performance, alongside a discussion key challenges future research directions.

Language: Английский

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A Phase‐Transition–Free Sodium Vanadium Phosphate Cathode via Medium‐Entropy Engineering for Superior Sodium Ion Batteries

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

Published: Jan. 15, 2025

Abstract Na 3 V 2 (PO 4 ) , based on multi‐electron reactions between 3+ /V 4+ 5+ is a promising cathode material for SIBs. However, its practical application hampered by the inferior conductivity, large barrier of and stepwise phase transition. Herein, these issues are addressed constructing medium‐entropy (Na 3.2 1.1 Ti 0.2 Al Cr Mn Ni 0.1 ME‐NVP) with strong ME─O bond highly occupied Na2 sites. Benefiting from effect, ME‐NVP manifests phase‐transition–free reaction mechanism, two reversible plateaus at 3.4 (V 4.0 ), small volume change (2%) during + insertion/extraction processes, as confirmed comprehensive in/ex situ characterizations. Moreover, kinetics analysis illuminates superior diffusion ability ME‐NVP. Thus, realizes remarkable rate capability 67 mA h g −1 50C long‐term lifespan over 10 000 cycles (capacity retention 81.3%). Theoretical calculations further illustrate that weak binding ion in channel responsible rapid diffusion, accounting kinetics. rigid MEO 6 octahedral feasible rearrangement ions can suppress transition, thus endowing an ultrastable cathode. This work highlights significant role engineering advancing output voltage, cycling stability, polyanionic cathodes.

Language: Английский

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Polyanion-type iron-based sulfate cathode materials: from fundamental research to industrialization

Energy storage materials, Journal Year: 2025, Volume and Issue: unknown, P. 104049 - 104049

Published: Jan. 1, 2025

Language: Английский

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Activating Reversible V⁴⁺/V⁵⁺ Redox Couple in NASICON‐Type Phosphate Cathodes by High Entropy Substitution for Sodium‐Ion Batteries

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

Published: Jan. 28, 2025

Abstract Vanadium‐based Na superionic conductor (NASICON) type materials (Na x VM(PO 4 ) 3 , M = transition metals) have attracted extensive attention when used as sodium‐ion batteries (SIBs) cathodes due to their stable structures and large + diffusion channels. However, the poor electrical conductivity mediocre energy density, which hinder practical applications. Activating V 4+ /V 5+ redox couple (V ≈4.1 vs /Na) is an effective way elevate density of SIBs, whereas irreversible phase severe structural distortion will inevitably result in fast capacity fading unsatisfactory rate capability. Herein, a high entropy regulation strategy proposed optimize detailed crystal structure improve reversibility crystalline transformation material. With activated reversible couple, structure, electrochemical kinetics, material 3.2 1.5 Fe 0.1 Al Cr Mn Cu (PO (NVMP‐HE) exhibits outstanding performance with highly specific 120.1 mAh g −1 at C excellent cycling stability (92.4% retention after 1000 cycles 20 C). Besides, situ X‐ray diffraction (XRD) measurement reveals that smooth three‐phase reaction involved this high‐entropy cathode existence mesophase facilitates transition.

Language: Английский

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