Ti Substitution Strategy Improves Electrochemical Performance of Na₃V₂(PO₄)₂F₃ Cathode

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1840 - 1850

Published: March 21, 2025

Language: Английский

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A Review of Carbon Anode Materials for Sodium-Ion Batteries: Key Materials, Sodium-Storage Mechanisms, Applications, and Large-Scale Design Principles

Molecules, Journal Year: 2024, Volume and Issue: 29(18), P. 4331 - 4331

Published: Sept. 12, 2024

Sodium-ion batteries (SIBs) have been proposed as a potential substitute for commercial lithium-ion due to their excellent storage performance and cost-effectiveness. However, the substantial radius of sodium ions, there is an urgent need develop anode materials with exemplary electrochemical characteristics, thereby enabling fabrication sodium-ion high energy density rapid dynamics. Carbon are highly valued in energy-storage field diverse structures, low cost, reliability. This review comprehensively summarizes typical structure; mechanisms; current development status various carbon-based SIBs, such hard carbon, soft graphite, graphene, carbon nanotubes (CNTs), porous materials. also provides overview future related companies batteries. Furthermore, it offers summary outlook on challenges opportunities associated design principles large-scale production high-energy-density requirements. avenue exploring outstanding improvement strategies materials, which can provide guidance application research.

Language: Английский

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Achieving High-Performance Na₃V₂(PO₄)₂F₃ Cathode Material through a Bifunctional N-Doped Carbon Network

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(27), P. 35179 - 35189

Published: June 25, 2024

Na3V2(PO4)2F3 (NVPF) is emerging as a popular cathode for sodium-ion batteries owing to its stable structure, high operating voltage, and large energy density. However, practical application hindered by low conductivity. In addition, due the loss of fluorine during synthesis, Na3V2(PO4)3 (NVP) impurity often easily generated, resulting in decrease actual voltage. Herein, bifunctional carbon network composed an N-doped layer bridge constructed around NVPF particles. Through pyrolysis polydopamine (PDA), particles are covered situ layer, generated polytetrafluoroethylene (PTFE) also coated with carbon. Besides, PTFE serves supplement ensure that pure obtained. As result, network-modified delivers reversible capacity (125.7 mA h g–1 at 0.2 C) appreciable cycle stability (92.7% 1 C over 300 cycles, 89.8% 10 1500 cycles). When assembled into full cell commercial hard anode, it displays discharge median voltage up 3.62 V C. Furthermore, achieves density 373.7 W kg–1 power 461.2 kg–1, excellent specific retention 78.2% after 200 cycles. Therefore, this modification method expected be extended other fluorine-containing materials poor electrical

Language: Английский

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Lanthanum-doped Na4Fe3(PO4)2P2O7/C as cathode materials in sodium-ion batteries: Enhanced ion diffusion kinetics and embedded pseudocapacitance

Journal of Power Sources, Journal Year: 2025, Volume and Issue: 635, P. 236531 - 236531

Published: Feb. 16, 2025

Language: Английский

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In-situ interface engineering of NVOPF nanosheets with cross-linked conductive networks for superior sodium storage

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106259 - 106259

Published: March 1, 2025

Language: Английский

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High-entropy engineering enables O3-type layered oxide with high structural stability and reaction kinetic for sodium storage

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: unknown, P. 137438 - 137438

Published: March 1, 2025

Language: Английский

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Effect of NH3 addition on the preparation of nitrogen-doped carbon nanomaterials by flame synthesis method

Carbon letters, Journal Year: 2024, Volume and Issue: 34(9), P. 2343 - 2355

Published: June 27, 2024

Language: Английский

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Effects of Bi doping on the electrochemical performance of Na3V2(PO4)3F3 cathode material for sodium ion batteries

Solid State Ionics, Journal Year: 2024, Volume and Issue: 414, P. 116621 - 116621

Published: June 22, 2024

Language: Английский

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Electronic/Ionic Dual Functional Layer-Coated Na₃V₂(PO₄)₂F₃ Cathode with High Sodium Storage Performance

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(29), P. 10892 - 10904

Published: July 8, 2024

Language: Английский

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The Synergistic Approach of Sol-Gel and Freeze-Drying Techniques in Crafting Lanthanum-Doped Na4fe3(Po4)2p2o7 as Cathode Materials in Sodium-Ion Battery with Enhanced Ion Diffusion Kinetics and Embedded Pseudocapacitance

Published: Jan. 1, 2024

The iron-based hybrid polyanionic compound Na4Fe3(PO4)2(P2O7) is perceived a potential cathode for sodium-ion batteries (SIBs) on account of its high theoretical capacity, resource abundance, nontoxicity and stable framework structure, however, sodium storage capabilities are hindered by sluggish ionic mobility kinetics. This paper reports the successful synthesis porous La-doped materials using sol-gel freeze-drying techniques. La4Fe2.96La0.04(PO4)2(P2O7)/C (NFPP-0.04) showcases remarkable ion mobility, outstanding cycling stability, exceptionally discharge specific capacity. These attributes attributed to enhancement embedded pseudocapacitance electrochemical kinetics through synergistic effect lanthanum doping technology. NFPP-0.04 emerges capacity (128.4 mAh g-1 at 0.2 C, 1 C = 129 g-1) eminent durability (capacity retention 97.2% after 100 cycles C). Furthermore, in situ X-ray diffraction analysis revealed exceptional structural stability NFPP-0.04. Additionally, correlation cyclic voltammetry curves various scan rates confirms that charge/discharge mechanism predominantly relies pseudocapacitance. study highlights feasibility enhancing precise doping. Consequently, as promising candidate cathodes SIBs.

Language: Английский

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