Construction of 3D pomegranate-like Na3V2(PO4)3/conducting carbon composites for high-power sodium-ion batteries

Wang, Enhui; Xiang, Wei; Rajagopalan, Ranjusha; Wu, Zhenguo; Yang, Junghoon; Chen, Mingzhe; Zhong, Biao; Dou, Shi Xue; Chou, Shulei; Guo, Xiao; Kang, Yong‐Mook

doi:10.1039/c7ta00153c

Cited by 105 publications

(57 citation statements)

References 53 publications

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“…The crystal structures of the three samples were investigated by XRD, as shown in figure 1(a). The diffraction peaks displayed by the patterns of all the three samples reveal a typical NASICON structure crystallized in the space group R3c (a=8.724 Å, c=21.764 Å) [35,36]. In addition, the intensity of diffraction peaks of the NVP/ CNF samples gradually increases as the temperature increases from 700 to 900°C.…”

Section: Resultsmentioning

confidence: 85%

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Luo

Chen

et al. 2020

Mater. Res. Express

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This work focuses on the preparation of a 3D flexible Na 3 V 2 (PO 4 ) 3 /C fiber membrane, as selfstanding cathode for Na-ion batteries, via a facile and simple electrospinning method, is followed by a hot-pressing process. A series of heat treatment temperatures are studied in detail, it is found that the temperature of the thermal process is a key parameter for controlling the structural organization of the material, as well as the size and dispersion of Na 3 V 2 (PO 4 ) 3 nanoparticles on the carbon surface. Hence, Na 3 V 2 (PO 4 ) 3 nanoparticles, with a size of 40 nm and highly disperse on the carbon nanofibers, are obtained after calcination at 800°C. In addition, this sample (Na 3 V 2 (PO 4 ) 3 /C Nanofiber-800) exhibits the best electrochemical performances among all the samples. For instance, it displays a considerably high initial discharge capacity of 109, 84, 77, and 71 mA h g −1 at a current density of 0.1, 10, 20, and 30 C, respectively. Moreover, the Na 3 V 2 (PO 4 ) 3 /C Nanofiber-800 shows notable cycle stability with about 95.3% capacity retention of its initial capacity after 1000 cycles at 2 C, These high performances is attributed to the unique nanofiber structure and uniform distribution of Na 3 V 2 (PO 4 ) 3 nanoparticles in the highly conductive carbon matrix.

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Section: Resultsmentioning

confidence: 85%

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Luo

Chen

et al. 2020

Mater. Res. Express

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“…To determine the nature of carbon in both as‐prepared samples, Raman measurements were characterized and shown in Figure b. There are several bands from 300 to 1100 cm −1 , corresponding to different vibrations/bending modes of the [PO 4 ]/[VO 6 ] polyhedral, wherein the Raman fingerprints of NVP@C/MWCNT samples exhibit lower extents than those of NVP@C, due to the stronger carbon signals and higher graphitization. The two typical broad peaks at around 1350 and 1600 cm −1 correspond to the D band (disordered carbon) and G band (graphitic carbon), respectively, meaning the presence of amorphous carbon and MWCNTs.…”

Section: Resultsmentioning

confidence: 99%

Carbon‐Coated Na₃V₂(PO₄)₃ Supported on Multiwalled Carbon Nanotubes for Half‐/Full‐Cell Sodium‐Ion Batteries

Chen

Zhong²,

Ren

et al. 2020

Energy Tech

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Na‐ion superionic conductor (NASICON)‐based Na3V2(PO4)3 is regarded as a potential cathode for sodium‐ion batteries, due to the excellent thermal stability and large ion diffusion channel. Herein, multiwalled carbon nanotube–pierced Na3V2(PO4)3 (NVP@C/MWCNT) is synthesized through a simple sol–gel approach. Tested as a cathode for sodium‐ion half batteries, the as‐prepared electrode displays an excellent reversible capacity (111.6 mA h g−1 at 1 C) and superior rate capability (63.2 mA h g−1 at 80 C). Furthermore, in situ X‐ray diffraction (XRD) patterns of NVP@C/MWCNTs indicate the apparent two‐phase (de‐)sodiation process. In contrast, the ortho‐disodium salts of tetrahydroxyquinone (o‐Na2C6H2O6) are prepared as an anode, which demonstrates a reversible discharge capacity of 156.8 mA h g−1 at 0.1 C and enhanced high‐rate performance (72.1 mA h g−1 at 20 C) for sodium–organic half batteries. When evaluated as a Na‐ion full cell, a NVP@C/MWCNT || o‐Na2C6H2O6 full cell shows outstanding rate capability (33.3 mA h g−1 at 1.0 A g−1). Such impressive electrochemical behavior is related to the addition of multiwalled carbon nanotubes. This not only enhances electronic conductivity of NVP, but also inhibits the growth of grains, which shortens the Na+ diffusion length and increases the contact space between electrode/electrolyte.

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“…First, NH 4 VO 3 was dissolved in distilled water under constant stirrer at 80 °C and yellow solution was observed. Then, citric acid was added drop by drop into the (VO 3 ) − aqueous solution and the color of solution was gradually changed from yellow to dark blue 24 . Afterwards, other precursors of Na, PO 4 and F (for doping) were added into the solution.…”

Section: Resultsmentioning

confidence: 99%

An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

Muruganantham

Chiu

Yang

et al. 2017

Sci Rep

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A series of Na3−xV2(PO4−xFx)3 (x = 0, 0.1, 0.15 and 0.3) polyanion cathode materials are synthesized via a sol-gel method. The optimal doping concentration of F in Na3V2(PO4)3 is 0.15 mol %. By neutron powder diffraction data, the chemical composition of as-synthesized material is Na2.85V2(PO3.95F0.05)3. The half-cell of Na2.85V2(PO3.95F0.05)3 cathode exhibits a stable discharge capacity of 103 mAh g−1 and 93% of capacity retention over 250 cycles without decay at 0.1 A g−1, which is higher than that of bare Na3V2(PO4)3 (98 mAh g−1). The high rate capability of Na2.85V2(PO3.95F0.05)3 is also dramatically enhanced via increase the conductivity of host material by F-doping. Moreover, the symmetrical Na-ion full-cell is fabricated using Na2.85V2(PO3.95F0.05)3 as cathode and anode materials. It is achieved that the good reversibility and superior cycling stability about 98% of capacity retention with ~100% of coulombic efficiency at 1.0 A g−1 throughout 1000 cycles. These results demonstrate that the optimal amount of Na2.85V2(PO3.95F0.05)3 is a distinctive potential candidate for excellent long-term cyclic stability with high rate low-cost energy storage applications.

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Construction of 3D pomegranate-like Na₃V₂(PO₄)₃/conducting carbon composites for high-power sodium-ion batteries

Abstract: This study employed a conductive carbon grown in situ to obtain an NVP@C composite with a pomegranate-like structure, which exhibited excellent rate performance.

Cited by 105 publications

References 53 publications

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Carbon‐Coated Na₃V₂(PO₄)₃ Supported on Multiwalled Carbon Nanotubes for Half‐/Full‐Cell Sodium‐Ion Batteries

An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

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Construction of 3D pomegranate-like Na3V2(PO4)3/conducting carbon composites for high-power sodium-ion batteries

Abstract: This study employed a conductive carbon grown in situ to obtain an NVP@C composite with a pomegranate-like structure, which exhibited excellent rate performance.

Cited by 105 publications

References 53 publications

Electrospun Na3V2(PO4)3/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Electrospun Na3V2(PO4)3/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Carbon‐Coated Na3V2(PO4)3 Supported on Multiwalled Carbon Nanotubes for Half‐/Full‐Cell Sodium‐Ion Batteries

An Efficient Evaluation of F-doped Polyanion Cathode Materials with Long Cycle Life for Na-Ion Batteries Applications

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Construction of 3D pomegranate-like Na₃V₂(PO₄)₃/conducting carbon composites for high-power sodium-ion batteries

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Electrospun Na₃V₂(PO₄)₃/C nanofibers as self-standing cathode material for high performance sodium ion batteries

Carbon‐Coated Na₃V₂(PO₄)₃ Supported on Multiwalled Carbon Nanotubes for Half‐/Full‐Cell Sodium‐Ion Batteries