Rod-like anhydrous V<sub>2</sub>O<sub>5</sub> assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

Zhou, Weijun; Chen, Jizhang; Chen, Minfeng; Xu, Xinwu; Tian, Qinghua; Xu, Junling; Wong, Ching‐Ping

doi:10.1039/c9ra06143f

Cited by 51 publications

(21 citation statements)

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“…Moreover, rod‐like anhydrous V 2 O 5 (RA‐V 2 O 5 , Figure 5b) assembled by tiny nanosheets also exhibits excellent performances, such as high reversible capacity (449.8 mA h g −1 at 0.1 A g −1 ), and great long‐term cyclability (86.8% of capacity retention after 2000 cycles at 2 A g −1 ), which are significantly superior to the control sample. [ 72 ] The reasons of such enhanced performance can be better explained from the aspect of morphology structure due to its larger specific surface (218 m 2 g −1 ) than control sample (5.3 m 2 g −1 ) and former's pore volume (0.96 cm 3 g −1 ) is larger than later (0.01 cm 3 g −1 ). Therefore, faster electrochemical kinetics and better performance can be achieved in RA‐V 2 O 5 /Zn battery.…”

Section: Challenges and Optimizationmentioning

confidence: 99%

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

et al. 2020

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In recent years, zinc‐ion batteries (ZIBs) with near neutral (pH ≈ 4–6) Zn2+‐containing aqueous electrolyte have received extensive research due to their advantages of high safety, low production cost, suitable anode zinc, and environmental friendliness, etc. At present, one of the key challenges of aqueous ZIBs is the development of cathode materials with stable structure, rapid kinetics, and high capacity, etc. Compared with other cathode materials, V2O5 has an important potential application because of its high theoretical specific capacity (589 mA h g−1) based on two electron transfers, relatively low production cost, and suitable layered structure that facilitates zinc ion insertion/extraction. Herein, the following sections are proposed: 1) An understanding of the structure and energy storage mechanism of V2O5; 2) The recent development on the aqueous Zn/V2O5 battery from properties of V2O5 cathode and composition optimization of battery structure; 3) The application of V2O5 cathode in flexible ZIBs; and 4) The outlook and development trends in the future.

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Section: Challenges and Optimizationmentioning

confidence: 99%

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

et al. 2020

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“…Up to now, a variety of cathode materials for AZIBs have been reported, mainly including Mn-based oxides (Huang J. H. et al, 2018 ; Liu et al, 2019 ; Guo et al, 2020 ), V-based oxides (Tang F. J. et al, 2019 ; Zhou W. J. et al, 2019 ), Mo-based oxides (Kim et al, 2017 ), Prussian blue analogs (Trocoli and La Mantia, 2015 ), and organic and polymer compounds (Li B. Q. et al, 2018 ). Among them, MnO 2 might be the most promising one, primarily in terms of specific capacity and working potential (Ming et al, 2019 ; Zeng et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

High-Performance Anti-freezing Flexible Zn-MnO2 Battery Based on Polyacrylamide/Graphene Oxide/Ethylene Glycol Gel Electrolyte

et al. 2020

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It remains a great challenge for aqueous zinc-ion batteries to work at subzero temperatures, since the water in aqueous electrolytes would freeze and inhibit the transportation of electrolyte ions, inevitably leading to performance deterioration. In this work, we propose an anti-freezing gel electrolyte that contains polyacrylamide, graphene oxide, and ethylene glycol. The graphene oxide can not only enhance the mechanical properties of gel electrolyte but also help construct a three-dimensional macroporous network that facilitates ionic transport, while the ethylene glycol can improve freezing resistance. Due to the synergistic effect, the gel electrolyte exhibits high ionic conductivity (e.g., 14.9 mS cm −1 at −20 • C) and good mechanical properties in comparison with neat polyacrylamide gel electrolyte. Benefiting from that, the assembled flexible quasi-solid-state Zn-MnO 2 battery exhibits good electrochemical durability and superior tolerance to extreme working conditions. This work provides new perspectives to develop flexible electrochemical energy storage devices with great environmental adaptability.

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“…Furthermore, such material can still delivers a specific capacity of 248 mAh g −1 even at a ultrahigh current density of 30 A g −1 , such outstanding rate capability should be mainly attributed to fast ions transport kinetics that boosted by the intercalation of H 2 O. [46,188] Another representative work was reported from Shin et al, [164] taking the mixed valence vanadium oxide, V 6 O 13 , as research object, they demonstrated that the hydrated intercalation can facilitates Zn 2+ diffusion pass through the electrodeelectrolyte interface and host lattice. To reveal the origin role of structural water in enhancing the electrochemical performance, they compared the kinetic behavior of Zn 2+ with and without water.…”

Section: H 2 O Intercalationmentioning

confidence: 99%

Section: Structural Engineering For Cathode Materialsmentioning

confidence: 99%

Understanding the Design Principles of Advanced Aqueous Zinc‐Ion Battery Cathodes: From Transport Kinetics to Structural Engineering, and Future Perspectives

Yong

Wang

et al. 2020

Advanced Energy Materials

267

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have also greatly aroused the positive exploration of alternative LIB technologies in recent years. [44] In contrast to the flammable organic electrolyte in LIBs, the aqueous one exhibits lower cost, higher safety, and especially the superior ionic conductivity, which is generally two orders of magnitude higher than that of the organic system. [9,10] All those unparalleled advantages would make the aqueous battery technologies to be the promising candidates in the future. [11] Rechargeable aqueous zinc-ion batteries (AZIBs), which is mainly composed of zinc metal anode, zinc salt-based aqueous electrolyte, and Zn 2+ host cathode, hold the great promise for energy storage applications in very recent years. [12,13] Compared with nonaqueous alkali-ion batteries, the use of cheap and high ambient stable zinc metal anode and inexpensive aqueous electrolyte with superior ionic conductivity (Figure 1a) would make such type of battery to be one of the most promising commercial candidates in the future market. [14-17] To date, extensive studies have been reported for AZIBs, and relating publications have dramatically increased especially in these two years, as shown in Figure 1b. However, the insufficient energy density seems to become the bottleneck that hinder their practical applications at current status. [4,5,18] Such issue could be ascribed to the narrow operating voltage of aqueous electrolyte, insufficient electrochemical performance of cathode materials, and Zn anode. [13,19,20] Besides, the influence of other components such as separator and collector also should be considered to some extent. [20,21] Among them, the studies of widening operating voltage of electrolyte and the optimization of other components only received less attention, which still remain at the early stage. [22,23] On the contrary, more attentions were paid to the electrochemical performance tuning of electrode materials. [24-26] Besides, considering the fixed operating voltage of Zn metal anode, the modification of cathode materials seems to provide more possibilities to effectively improve the energy density of AZIBs, owing to their rich material systems. [20,26,27] Under these considerations, the rational design of advanced cathodes is expected to be a preferential task to develop. Up to now, many types of materials have been exploited as cathode candidates and applied for AZIBs, however, those Rechargeable aqueous zinc-ion batteries (AZIBs) have attracted extensive attention and are considered to be promising energy storage devices, owing to their low cost, eco-friendliness, and high security. However, insufficient energy density has become the bottleneck for practical applications, which is greatly influenced by their cathodes and makes the exploration of high-performance cathodes still a great challenge. This review underscores the recent advances in the rational design of advanced cathodes for AZIBs. The review starts with a brief summary and evaluation of cathode material systems, as well as the introduction of proposed storage mechani...

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Rod-like anhydrous V₂O₅ assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

Abstract: V2O5 with intriguing micro/nano-hierarchical structure is fabricated via the pyrolysis of MIL-47 (a MOF material) and displays great performances as the cathode material for aqueous zinc-ion batteries.

Cited by 51 publications

References 53 publications

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

High-Performance Anti-freezing Flexible Zn-MnO2 Battery Based on Polyacrylamide/Graphene Oxide/Ethylene Glycol Gel Electrolyte

Understanding the Design Principles of Advanced Aqueous Zinc‐Ion Battery Cathodes: From Transport Kinetics to Structural Engineering, and Future Perspectives

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Rod-like anhydrous V2O5 assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

Abstract: V2O5 with intriguing micro/nano-hierarchical structure is fabricated via the pyrolysis of MIL-47 (a MOF material) and displays great performances as the cathode material for aqueous zinc-ion batteries.

Cited by 51 publications

References 53 publications

The Current Developments and Perspectives of V2O5 as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

The Current Developments and Perspectives of V2O5 as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

High-Performance Anti-freezing Flexible Zn-MnO2 Battery Based on Polyacrylamide/Graphene Oxide/Ethylene Glycol Gel Electrolyte

Understanding the Design Principles of Advanced Aqueous Zinc‐Ion Battery Cathodes: From Transport Kinetics to Structural Engineering, and Future Perspectives

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Rod-like anhydrous V₂O₅ assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries

The Current Developments and Perspectives of V₂O₅ as Cathode for Rechargeable Aqueous Zinc‐Ion Batteries