Three‐Dimensional Graphene Network Decorated with Highly Symmetrical Cuboid Na3V2(PO4)2F3 Particles: High Rate Capability and Cycling Stability for Sodium‐Ion Batteries

Xu, Shaofa; Li, Huijun; Wang, Xiaomin

doi:10.1002/celc.202001514

Cited by 22 publications

(7 citation statements)

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“…Given the cost and elemental abundance, sodium‐ion batteries (SIBs) have been regarded as a promising complementarity to lithium‐ion batteries (LIBs) for emerging large‐scale energy storage systems. [ 1 ] Recently, numerous cathode materials for SIBs, such as layered oxides, [ 2 ] polyanion materials, [ 3 ] and Prussian blue compounds, [ 4 ] have been extensively explored. Among these candidates, P2‐type layered transition metal (TM) oxides (Na x TMO 2 , 0.5 ≤ x ≤ 0.8) have attracted much attention because of their relatively high theoretical capacities and low costs.…”

Section: Introductionmentioning

confidence: 99%

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

et al. 2022

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Prussian blue compounds, [4] have been extensively explored. Among these candidates, P2-type layered transition metal (TM) oxides (Na x TMO 2 , 0.5 ≤ x ≤ 0.8) have attracted much attention because of their relatively high theoretical capacities and low costs. [5] Nevertheless, Na x TMO 2 materials usually undergo an undesired P2-O2 phase transition in high-voltage regions, leading to a large volume change, rapid capacity decay, and poor lifetime. [5b,6] Recently, this issue has been largely mitigated by doping inactive material elements (such as Li, [7] Mg, [6] Ti, [8] Al, [9] and Zn [10] ) in TM layers, but at the expense of specific capacity.Apart from the cationic redox, the utilization of anionic redox activities provides a new avenue for attaining high-capacity electrode materials. Nevertheless, the nature of the oxygen redox chemistry is still under active debate, and the representative hypotheses mainly include the following: i) Tarascon et al. visualized the formation of (OO) n− peroxo-like dimers with shortened OO distances in Li-rich layered electrode materials; [11] ii) Bruce et al. proposed that the localized electron holes on O atoms, rather than true O 2 2− peroxide, could be generated upon Li + removal; [12] while iii) Ceder et al. suggested that the nonbonding oxygen states from LiOLi structural configurations in alkalirich and disordered systems are responsible for the oxygen redox reaction. [13] More recently, the formation of molecular O 2 trapped Sodium-ion batteries (SIBs) have attracted widespread attention for large-scale energy storage, but one major drawback, i.e., the limited capacity of cathode materials, impedes their practical applications. Oxygen redox reactions in layered oxide cathodes are proven to contribute additionally high specific capacity, while such cathodes often suffer from irreversible structural transitions, causing serious capacity fading and voltage decay upon cycling, and the formation process of the oxidized oxygen species remains elusive. Herein, a series of Al-doped P2-type Na 0.6 Ni 0.3 Mn 0.7 O 2 cathode materials for SIBs are reported and the corresponding charge compensation mechanisms are investigated qualitatively and quantitatively. The combined analyses reveal that Al doping boosts the reversible oxygen redox reactions through the reductive coupling reactions between orphaned O 2p states in NaOAl local configurations and Ni 4+ ions, as directly evidenced by X-ray absorption fine structure results. Additionally, Al doping also induces an increased interlayer spacing and inhibits the unfavorable P2 to O2 phase transition upon desodiation/sodiation, which is common in P2-type Mn-based cathode materials, leading to the great improvement in capacity retention and rate capability. This work provides deeper insights into the development of structurally stable and high-capacity layered cathode materials for SIBs with anion-cation synergetic contributions.

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Section: Introductionmentioning

confidence: 99%

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

et al. 2022

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“…Particularly, NVPF@rGO represents competitive rate properties to NVPF-based materials reported in the previous papers (Figure g and Table S2). ,,,,,− Apart from that, NVPF@rGO exhibits preeminent long-term durability at a high rate. NVPF@rGO achieves a capacity of 107 mAh g –1 with a high capacity conservation ratio of 85.6% (a capacity attenuation of 0.002% per cycle) after 7000 cycles at 10 C, which far exceeds the values of pure NVPF (38 mAh g –1 with a capacity conservation ratio of 77.6% after 4000 cycles, Figure h).…”

Section: Resultsmentioning

confidence: 99%

Microwave-Assisted Hydrothermal Synthesis of Na₃V₂(PO₄)₂F₃ Nanocuboid@Reduced Graphene Oxide as an Ultrahigh-Rate and Superlong-Lifespan Cathode for Fast-Charging Sodium-Ion Batteries

Guan,

Zhou,

Zhou

et al. 2024

ACS Appl. Mater. Interfaces

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Na 3 V 2 (PO 4 ) 2 F 3 (NVPF) has been regarded as a favorable cathode for sodium-ion batteries (SIBs) due to its high voltage and stable structure. However, the limited electronic conductivity restricts its rate performance. NVPF@reduced graphene oxide (rGO) was synthesized by a facile microwave-assisted hydrothermal approach with subsequent calcination to shorten the hydrothermal time. NVPF nanocuboids with sizes of 50−150 nm distributed on rGO can be obtained, delivering excellent electrochemical performance such as a longevity life (a high capacity retention of 85.6% after 7000 cycles at 10 C) and distinguished rate capability (116 mAh g −1 at 50 C with a short discharging/charging time of 1.2 min). The full battery with a Cu 2 Se anode represents a capacity of 116 mAh g −1 at 0.2 A g −1 . The introduction of rGO can augment the electronic conductivity and advance the Na + diffusion speed, boosting the cycling and rate capability. Besides, the small lattice change (3.3%) and high structural reversibility during the phase transition process between Na 3 V 2 (PO 4 ) 2 F 3 and NaV 2 (PO 4 ) 2 F 3 testified by in situ X-ray diffraction are also advantageous for Na storage behavior. This work furnishes a simple method to synthesize polyanionic cathodes with ultrahigh rate and ultralong lifespan for fast-charging SIBs. KEYWORDS: sodium-ion batteries, fast-charging, cathode, Na 3 V 2 (PO 4 ) 2 F 3 @rGO, in situ XRD

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“…This high surface area facilitates the penetration of electrolyte and also the contact between the active material and the electrolyte. 63…”

Section: Resultsmentioning

confidence: 99%

Realizing outstanding electrochemical performance with Na₃V₂(PO₄)₂F₃ modified with an ionic liquid for sodium-ion batteries

et al. 2022

RSC Adv.

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Three‐Dimensional Graphene Network Decorated with Highly Symmetrical Cuboid Na₃V₂(PO₄)₂F₃ Particles: High Rate Capability and Cycling Stability for Sodium‐Ion Batteries

Cited by 22 publications

References 55 publications

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

Microwave-Assisted Hydrothermal Synthesis of Na₃V₂(PO₄)₂F₃ Nanocuboid@Reduced Graphene Oxide as an Ultrahigh-Rate and Superlong-Lifespan Cathode for Fast-Charging Sodium-Ion Batteries

Realizing outstanding electrochemical performance with Na₃V₂(PO₄)₂F₃ modified with an ionic liquid for sodium-ion batteries

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Three‐Dimensional Graphene Network Decorated with Highly Symmetrical Cuboid Na3V2(PO4)2F3 Particles: High Rate Capability and Cycling Stability for Sodium‐Ion Batteries

Cited by 22 publications

References 55 publications

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium‐Ion Battery Electrode

Microwave-Assisted Hydrothermal Synthesis of Na3V2(PO4)2F3 Nanocuboid@Reduced Graphene Oxide as an Ultrahigh-Rate and Superlong-Lifespan Cathode for Fast-Charging Sodium-Ion Batteries

Realizing outstanding electrochemical performance with Na3V2(PO4)2F3 modified with an ionic liquid for sodium-ion batteries

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Product

Resources

About

Three‐Dimensional Graphene Network Decorated with Highly Symmetrical Cuboid Na₃V₂(PO₄)₂F₃ Particles: High Rate Capability and Cycling Stability for Sodium‐Ion Batteries

Microwave-Assisted Hydrothermal Synthesis of Na₃V₂(PO₄)₂F₃ Nanocuboid@Reduced Graphene Oxide as an Ultrahigh-Rate and Superlong-Lifespan Cathode for Fast-Charging Sodium-Ion Batteries

Realizing outstanding electrochemical performance with Na₃V₂(PO₄)₂F₃ modified with an ionic liquid for sodium-ion batteries