Surface-assembled highly flexible Na3(VOPO4)2F nanocube cathode for high-rate binder-free Na-ion batteries

Deng, Bohua; Yue, Ning; Dong, Haoyang; Gui, Qiuyue; Liang, Xiao; Liu, Jinping

doi:10.1016/j.cclet.2020.04.054

Cited by 19 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that Na 3 V 2 (PO 4 ) 2 F 2 O ( y = 0.5) has the smallest particle size and, more importantly, the narrowest size distribution and a comparatively uniform particle morphology. Such change is probably related to the influence of intermediate products during calcination process. , When the amount of oxygen is gradually increased (0 < y < 0.5), more gases such as CO, CO 2 , and H 2 O are generated during calcination, which could consume carbon with less surface coating (see TEM in Figure a,b) and hinder Na 3 V 2 (PO 4 ) 2 F 3–2y O 2 y particle growth by forming more nuclei, the particle size is therefore slightly decreased. However, when the oxygen content is increased to a certain degree (0.5 < y < 1), the solid–gas equilibrium might be roughly achieved, and the Na 3 V 2 (PO 4 ) 2 F 3–2 y O 2 y particles tend to agglomerate to bigger particles with possibly thicker carbon coating.…”

Section: Resultsmentioning

confidence: 99%

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Sun

Wang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The abundant reserves of sodium resources and its low price make the desire to build energy storage systems on room-temperature rechargeable sodium batteries. The current challenge exists in exploring high-performance key materials, especially cathode materials. Vanadium-based phosphates have attracted extensive attention as a class of promising cathode materials for sodium batteries due to their stable structure, large capacity, and high voltage advantages. In this paper, sodium vanadium oxyfluorophosphate, Na3V2(PO4)2F3–2y O2y (0 ≤ y < 1), is exploited to improve its electrochemical performance through oxygen tuning. The effect of oxygen amount on the structure, morphology, and performance is comprehensively and comparatively investigated. It is found that the optimal electrochemical performance is achieved in Na3V2(PO4)2F2O when y = 0.5. Its specific discharge capacity at 0.1, 0.5, 1, 8, and 20 C is 125, 111, 101, 71, and 58 mA h g–1, respectively. The superior rate performance and good cyclability are ascribed to the low impurity, mixed V3+/V4+ valence state, small particle size, suitable residual carbon coating, low charge transfer resistance, fast Na+ diffusion, and particularly the regulation of charge/discharge potentials as well as polarizations due to proper oxygen tuning.

show abstract

Section: Resultsmentioning

confidence: 99%

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Sun

Wang

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…There have been growing numbers of examples using 3D-NAs in flexible EESDs. [112,[120][121][122][123][124][125][126][127] Various oxide NAs, such as Mn, Ti, Fe, Nb, and V-based oxides, have been utilized as cathodes or anodes in these studies. Yu et al fabricated a Li 4 Ti 5 O 12 -C tubular NA as a binder-free anode for high-rate LIBs.…”

Section: Flexible Devices Facilitated By Individual Nanostructure Surmentioning

confidence: 99%

“…With the rapid development of emerging energy storage techniques, the potential of 3D-NAs in device applications has been further highlighted, including the use of flexible PIBs [126] and high-voltage aqueous asymmetric SCs. [123,127] It should be emphasized that essential steps in the design of high-voltage flexible aqueous energy storage systems are either the establishment of a stable SEI between the electrode and aqueous electrolyte [128] or the maintenance of the dominant redox reaction of electrode materials (rather than water) [123] to attain high overpotentials; both of the key aspects can be ensured, without any influence of shape deformation, by using NAs that possess clean surfaces with no binders or additives.…”

Section: Flexible Devices Facilitated By Individual Nanostructure Surmentioning

confidence: 99%

Surface and Interface Engineering of Nanoarrays toward Advanced Electrodes and Electrochemical Energy Storage Devices

et al. 2021

Self Cite

View full text Add to dashboard Cite

Figure 6. a) Schematic illustration of the electron transport pathway in a SEI-wrapped 3D CNT NAs-sulfur cathode. Reproduced with permission. [99] Copyright 2017, Wiley-VCH. b) SEM images of CC@ZnO anode after cycling test without (b 1 ) and with (b 2 ) 3D CF NAs. Reproduced with permission. [103] Copyright 2016, Wiley-VCH. c) The local current density and electric field distribution of Zn anode on a planar current collector (c 1 ) and a 3D current collector (c 2 ). d) Regulated growth of SEI on 3D titanate NAs with ether electrolyte. e) Discharge/charge profiles of the Na 2 Ti 2 O 5 anode with ether electrolyte (inset: HRTEM image of the fully discharged Na 2 Ti 2 O 5 NSs). d,e) Reproduced with permission. [112] Copyright 2019, Wiley-VCH.

show abstract

“…Therefore, this cell well satisfies the requirements of grid energy storage for batteries. A flexible and binder-free Na 3 (VOPO 4 ) 2 F cathode with nanocubes tightly assembled on carbon cloth was recently fabricated by a facile solvothermal method [131]. About 90% (112 mA•h•g −1 ) and 86% (106 mA•h•g −1 ) of the 1C capacity were retained at 10C and 20C, respectively, a rate performance superior to prior works, taking into account the high mass loading > 2.0 mg•cm −2 .…”

Section: Polyanionic Compoundsmentioning

confidence: 99%

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Mauger

Julien

2020

Materials

View full text Add to dashboard Cite

Sodium-ion batteries (SIBs) were investigated as recently as in the seventies. However, they have been overshadowed for decades, due to the success of lithium-ion batteries that demonstrated higher energy densities and longer cycle lives. Since then, the witness a re-emergence of the SIBs and renewed interest evidenced by an exponential increase of the publications devoted to them (about 9000 publications in 2019, more than 6000 in the first six months this year). This huge effort in research has led and is leading to an important and constant progress in the performance of the SIBs, which have conquered an industrial market and are now commercialized. This progress concerns all the elements of the batteries. We have already recently reviewed the salts and electrolytes, including solid electrolytes to build all-solid-state SIBs. The present review is then devoted to the electrode materials. For anodes, they include carbons, metal chalcogenide-based materials, intercalation-based and conversion reaction compounds (transition metal oxides and sulfides), intermetallic compounds serving as functional alloying elements. For cathodes, layered oxide materials, polyionic compounds, sulfates, pyrophosphates and Prussian blue analogs are reviewed. The electrode structuring is also discussed, as it impacts, importantly, the electrochemical performance. Attention is focused on the progress made in the last five years to report the state-of-the-art in the performance of the SIBs and justify the efforts of research.

show abstract

Surface-assembled highly flexible Na3(VOPO4)2F nanocube cathode for high-rate binder-free Na-ion batteries

Cited by 19 publications

References 29 publications

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Surface and Interface Engineering of Nanoarrays toward Advanced Electrodes and Electrochemical Energy Storage Devices

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Contact Info

Product

Resources

About

Surface-assembled highly flexible Na3(VOPO4)2F nanocube cathode for high-rate binder-free Na-ion batteries

Cited by 19 publications

References 29 publications

Oxygen-Tuned Na3V2(PO4)2F3–2yO2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Oxygen-Tuned Na3V2(PO4)2F3–2yO2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Surface and Interface Engineering of Nanoarrays toward Advanced Electrodes and Electrochemical Energy Storage Devices

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Contact Info

Product

Resources

About

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries

Oxygen-Tuned Na₃V₂(PO₄)₂F_3–2yO_2y (0 ≤ y < 1) as High-Rate Cathode Materials for Rechargeable Sodium Batteries