Rapid and durable electrochemical storage behavior enabled by V4Nb18O55 beaded nanofibers: a joint theoretical and experimental study

Qian, Shangshu; Yu, Haoxiang; Cheng, Xing; Zheng, Runtian; Zhu, Haojie; Liu, Tingting; Shui, Miao; Xie, Ying; Shu, Jie

doi:10.1039/c8ta05447a

Cited by 25 publications

(18 citation statements)

References 44 publications

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“…Comparison with literature reports revealed the Mg-ion behavior of V 4 Nb 18 O 55 corresponded well to its Li-ion behavior; in Li ion, the redox processes occurred at ∼3.0 and ∼1.75 V vs Li/Li + , respectively, thereby possessing a similar redox potential separation (∼1.2 V). 38 These processes are attributed to the V 5+ /V 4+ couple and a combination of the V 4+ /V 3+ and Nb 5+ /Nb 4+ couples, respectively, as indicated by three peak maxima within the charge process (only two were visible on the discharge, as the lowest discharge maxima is not reached within the cycling window and the V 4+ /V 3+ and Nb 5+ /Nb 4+ couples overlap). These redox changes are corroborated with XAS analysis below.…”

Section: ■ Experimental Sectionmentioning

confidence: 94%

“…37 In contrast, bronze structures containing M 5+ distortions and offer a more rigid network for reversible metal intercalation. 33,38 The edge-sharing polyhedra present within ab planes provide a critical increase in framework rigidity (in comparison with corner-sharing-only frameworks). Upon Li + or Mg 2+ incorporation, the polyhedra are effectively locked in place by shared edges and cannot tilt.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The structure was solved in 2010 by Borrnert et al 41 and was first reported as a high-power anode material in Li-ion batteries by Qian et al in 2018. 38 V 4 Nb 18 O 55 shows the intrinsic ability to reversibly intercalate Mg 2+ with lower hysteresis in comparison to known oxide materials (0.5 vs 0.7 V). This was supported by hybrid-exchange DFT investigations, which revealed that V 4 Nb 18 O 55 possessed lowenergy Mg diffusion pathways (ca.…”

Section: ■ Introductionmentioning

confidence: 99%

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Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅

et al. 2020

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While commercial Li-ion batteries offer the highest energy densities of current rechargeable battery technologies, their energy storage limit has almost been achieved. Therefore, there is considerable interest in Mg batteries, which could offer increased energy densities compared to Li-ion batteries if a high-voltage electrode material, such as a transition metal oxide, can be developed. However, there are currently very few oxide materials which have demonstrated reversible and efficient Mg 2+ insertion and extraction at high voltages; this is thought to be due to poor Mg-ion diffusion kinetics within the oxide structural framework. Herein, the authors provide conclusive evidence of electrochemical insertion of Mg 2+ into the tetragonal tungsten bronze V4Nb18O55, with a maximum reversible electrochemical capacity of 75 mA h g −1 , which corresponds to a magnesiated composition of Mg4V4Nb18O55. Experimental electrochemical magnesiation/de-magnesiation revealed a large voltage hysteresis with charge/discharge (1.12 V vs Mg/Mg 2+ ); by limiting magnesiation to a composition of Mg2V4Nb18O55, this hysteresis can be reduced down to only 0.5 V. Hybrid-exchange Density Functional Theory (DFT) calculations suggest that a limited number of Mg sites are accessible via low-energy diffusion pathways, but that larger kinetic barriers need to be overcome to access the entire structure. The reversible Mg-ion intercalation involved concurrent V and Nb redox activity and changes in crystal structure, confirmed by an array of complimentary methods including powder X-ray diffraction, X-ray absorption spectroscopy, and energy-dispersive X-ray spectroscopy. Consequently, It can be concluded that the tetragonal tungsten bronzes show promise as intercalation electrode materials for Mg batteries. 30 the development of new energy storage technologies is par-31 amount. While Li-ion batteries have achieved great com-32 mercial success, 1 and are the most energy-dense recharge-33 able storage technology for portable applications, the tech-34 nology already heavily optimized, and future increases in35 energy density are predicted to be incremental. 2 Therefore,36 there is a need to develop new, low cost, and sustainable 37 battery chemistries for applications such as future electric 38 vehicle and grid storage. Mg metal anodes have a lower pro-39 pensity to form dendrites (that can cause cell failure) from 40 stripping and plating, which means that it could be used di-41 rectly as a metallic anode, 3-5 which would offer up to a five-42 fold increase in anodic volumetric energy density (Mg metal 43 = 3833 mA h cm −3 ) compared to Li-ion graphite anodes 44 (∼800 mA h cm −3 ), leading to an overall doubling in energy 45 density if a suitably high-energy density electrode material 46 can be found. 6 In comparison to Li + , the divalent ion Mg 2+ 47 transfers twice the charge (2 e − per Mg 2+ ion) when moving 48 between anode and cathode. This phenomenon decouples 49 the effect of electronic changes from the availability of va-50 cant sites in th...

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Section: ■ Experimental Sectionmentioning

confidence: 94%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅

et al. 2020

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“…Porous ZrNb 24 O 62 (P‐ZrNb 24 O 62 ) nanowires electrode for LIBs can display outstanding rate character (320 mA h g −1 at 0.1C rate and 182 mA h g −1 at 30C rate) and excellent cycling feature (90.2% capacity retention at 10C rate after 1500 cycles) (Figure i) . Besides above mentioned M–Nb–O electrodes, other compounds like WNb 12 O 33 , W 9 Nb 8 O 47 , GeNb 18 O 47 , VNb 9 O 24.9 , and V 4 Nb 18 O 55 also exhibit potential application prospects for LIBs.…”

Section: Other Nb‐based Oxides Electrodesmentioning

confidence: 99%

Niobium‐Based Oxides Toward Advanced Electrochemical Energy Storage: Recent Advances and Challenges

Deng

Zhu

et al. 2019

Small

154

115

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Niobium‐based oxides including Nb2O5, TiNbxO2+2.5x compounds, M–Nb–O (M = Cr, Ga, Fe, Zr, Mg, etc.) family, etc., as the unique structural merit (e.g., quasi‐2D network for Li‐ion incorporation, open and stable Wadsley– Roth shear crystal structure), are of great interest for applications in energy storage systems such as Li/Na‐ion batteries and hybrid supercapacitors. Most of these Nb‐based oxides show high operating voltage (>1.0 V vs Li+/Li) that can suppress the formation of solid electrolyte interface film and lithium dendrites, ensuring the safety of working batteries. Outstanding rate capability is impressive, which can be derived from their fast intercalation pseudocapacitive kinetics. However, the intrinsic poor electrical conductivity hinders their energy storage applications. Various strategies including structure optimization, surface engineering, and carbon modification are effectively used to overcome the issues. This review provides a comprehensive summary on the latest progress of Nb‐based oxides for advanced electrochemical energy storage applications. Major impactful work is outlined, promising research directions, and various performance‐optimizing strategies, as well as the energy storage mechanisms investigated by combining theoretical calculations and various electrochemical characterization techniques. In addition, challenges and perspectives for future research and commercial applications are also presented.

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“…Consequently, the electrochemical tests (Figure 6f–h) show superior electrochemical performance in a flexible SIC fabricated by T−Nb 2 O 5 /CNF and graphene framework/mesoporous carbon nanofiber (GF/mCNF), delivering an ultrahigh power density of 60 kW kg −1 at 55 Wh g −1 . Besides, studies on Nb 2 O 5 nanosheet, Ti 2 Nb 2 O 9 nanosheet and core‐shell structured Nb 2 O 5 @carbon as anodes for SICs have also shown impressive electrochemical performances [89,102–108] …”

Section: Materials For Sicsmentioning

confidence: 99%

Sodium‐Ion Capacitors: Recent Development in Electrode Materials

Zhang

et al. 2021

Batteries & Supercaps

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Sodium‐ion hybrid capacitors (SICs), combining the advantages of both sodium‐ion batteries (SIBs) and electrochemical supercapacitors, have captured sustained attention in the field of energy storage devices due to their high energy and power density, long lifespan, and excellent operation stability. However, conventional SICs based on battery‐type anodes and capacitive‐type cathodes suffer from imbalance on capacity and kinetics. In this regard, rational structure design on electrode materials is still necessary for SICs. Over the past two decades, tremendous efforts have been devoted to the exploration of suitable electrode materials to fabricate high‐performance SICs. Herein, after a brief introduction on the charge storage mechanisms of SICs, the recent developments on electrode materials for SICs are summarized, especially focusing on material design strategies as well as the relationship between structure and corresponding electrochemical performances. Furthermore, the challenges and opportunities for the further development of SICs are also proposed.

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Rapid and durable electrochemical storage behavior enabled by V₄Nb₁₈O₅₅ beaded nanofibers: a joint theoretical and experimental study

Abstract: V4Nb18O55 beaded nanofibers demonstrated highly reversible storage of lithium ions and transportation performance via a joint theoretical and experimental study.

Cited by 25 publications

References 44 publications

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅

Niobium‐Based Oxides Toward Advanced Electrochemical Energy Storage: Recent Advances and Challenges

Sodium‐Ion Capacitors: Recent Development in Electrode Materials

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Rapid and durable electrochemical storage behavior enabled by V4Nb18O55 beaded nanofibers: a joint theoretical and experimental study

Abstract: V4Nb18O55 beaded nanofibers demonstrated highly reversible storage of lithium ions and transportation performance via a joint theoretical and experimental study.

Cited by 25 publications

References 44 publications

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V4Nb18O55

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V4Nb18O55

Niobium‐Based Oxides Toward Advanced Electrochemical Energy Storage: Recent Advances and Challenges

Sodium‐Ion Capacitors: Recent Development in Electrode Materials

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Product

Resources

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Rapid and durable electrochemical storage behavior enabled by V₄Nb₁₈O₅₅ beaded nanofibers: a joint theoretical and experimental study

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅

Probing Mg Intercalation in the Tetragonal Tungsten Bronze Framework V₄Nb₁₈O₅₅