Constructing hollow nanotube-like amorphous vanadium oxide and carbon hybrid via in-situ electrochemical induction for high-performance aqueous zinc-ion batteries

Li, Chunli; Li, Meng; Xu, Huiting; Zhao, Fan; Gong, Siqi; Wang, Honghai; Qi, Junjie; Wang, Zhiying; Fan, Xiaobin; Peng, Wenchao; Liu, Jiapeng

doi:10.1016/j.jcis.2022.05.031

Cited by 37 publications

(11 citation statements)

References 65 publications

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“…Notably, the rate performance of the as-prepared Ov-KVO@rGO composite surpasses that of the other two electrodes, as well as outperforms all potassium vanadates and most of the other carbon surface modified/oxygen vacancy-rich vanadium-based cathodes in ZIBs (Figure 3f and Table S1, Supporting Information). [15,19,[31][32][33][34][35][36][37][38][39][40] The outstanding rate performance of Ov-KVO@rGO composite could be attributed to the synergistic effect of rGO-encapsulation assisted phase-stabilized crystal etching introduced electronic and crystal structures regulation of KVO, endowing high electronic conductivity, fast ion diffusion as well as alleviated dissolution and volume expansion of electrode during charge/discharge process. We further assessed the long-term cycling stability of Ov-KVO@rGO composite at a high current density of 5 A g −1 .…”

Section: Resultsmentioning

confidence: 99%

Phase‐Stabilized Crystal Etching to Unlock An Oxygen‐Vacancy‐Rich Potassium Vanadate For Ultra‐Fast Zn Storage

Luo,

Yu,

Zeng

et al. 2023

Small Methods

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Despite holding the advantages of high theoretical capacity and low cost, the practical application of layered‐structured potassium vanadates in zinc ion batteries (ZIBs) has been staggered by the sluggish ion diffusion, low intrinsic electronic conductivity, and unstable crystal structure. Herein, for the first time, a phase stabilized crystal etching strategy is proposed to innovate an oxygen‐vacancy‐rich K0.486V2O5 nanorod composite (Ov‐KVO@rGO) as a high‐performance ZIB cathode. The in situ ascorbic acid assisted crystal etching process introduces abundant oxygen‐vacancies into the K0.486V2O5 lattices, not only elaborately expanding the lattice spacing for faster ion diffusion and more active sites due to the weakened interlayer electrostatic interaction, but also enhancing the electronic conductivity by accumulating electrons around the vacancies, which is also evidenced by density functional theory calculations. Meanwhile, the encapsulating rGO layer ably stabilizes the K0.486V2O5 crystal phase otherwise is hard to endure subject to such a harsh chemical etching. As a result, the optimized Ov‐KVO@rGO electrode delivers record‐high rate capabilities with 462 and 272.39 mAh g−1 at 0.2 and 10 A g−1, respectively, outperforming all previously reported potassium vanadate cathodes and most other vanadium‐based materials. This work highlights a significant advancement of layer‐structured vanadium based‐materials towards practical application in ZIBs.

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Section: Resultsmentioning

confidence: 99%

Phase‐Stabilized Crystal Etching to Unlock An Oxygen‐Vacancy‐Rich Potassium Vanadate For Ultra‐Fast Zn Storage

Luo,

Yu,

Zeng

et al. 2023

Small Methods

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“…On this basis, amorphous materials without lattice restrictions possess isotropic feature, controllable structure, and abundant active sites for charge exchange, conducive to ionic transportation and storage. [148,149] More interestingly, the desolvation step of hydrated ions during the storage process can even be directly saved. For example, amorphous V 2 O 5 electrode derived from V 2 O 3 crystal oxidation (Figure 12h) represented an obstacle-free channel for ionic migration and shown a high specific capacity of ≈160 mAh g −1 at 0.5 A g −1 under −30 °C.…”

Section: Phase Structure Modificationmentioning

confidence: 99%

Design Strategies and Recent Advancements for Low‐Temperature Aqueous Rechargeable Energy Storage

Sun

Liu

et al. 2023

Advanced Energy Materials

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Therefore, it is increasingly urgent to develop novel unfrozen aqueous electrolytes to balance electrochemical performance and demand under lowtemperature. Hence, we comprehensively discuss the anti-freezing mechanisms and the composition of low-temperature electrolytes, as well as summarizing recently related reports in a timeline of milestones in the development process of low-temperature ARES (Figure 1a). Inspired by those reported works, how to modulate and optimize the component of aqueous electrolytes to remain unfrozen under ultralow temperature with ideal ionic conductivity is of particular importance to enlarge their application scope.As the ionic transport mediums, electrolytes play a crucial role in ionic migration between cathode and anode electrodes during the electrochemical processes, which are generally composed of appropriate salts and solvents. [12,13] Compared with most frequently-used organic solvents, the high solidification point (0 °C, 1 atm) of pure water as the main solvent for aqueous electrolytes primarily leads to inferior ion transfer under low temperature, restricting the broad application of ARES. [11,14] Thus, understanding the root cause of the abnormal freezing point for water among chalcogen hydrides is an essential precondition to develop lowtemperature aqueous electrolytes. The most apparent difference in various pure chalcogen hydrides is the unique existence of hydrogen bonds (H-bonds) in the pure water system. [15,16] H-bond is the essence of the coordinate bond between lonepair electrons in the strongly electronegativity N, O, or F atoms and hydrogen atom with partial positive charge rather than the shared electron pair effect (Figure 1b). From the chemical composition, the polar water molecules containing two atoms of hydrogen and one atom of oxygen in per chemical formula are H-bonds acceptors and donors at the same time, because the oxygen side with two lone-pair electrons has negative charge and the hydrogen side has positive charge, which provide the condition for H-bonds formation. Subsequently, the viscosity of liquid water increases and H-bonds restrict the vibration of water molecules, boosting the formation of longrange ordered crystalline structure under subzero temperature. Theoretically, one water molecule can effectively interact with up to four nearest neighbor water molecules by H-bonds interaction to generate the self-associated water clusters, which has the short-range ordering in the form of tetrahedral H-bonds within the water clusters due to the sp 3 hybridization of O Aqueous rechargeable energy storage (ARES) has received tremendous attention in recent years due to its intrinsic merits of low cost, high safety, and environmental friendliness. However, the relatively higher freezing point of conventional aqueous electrolytes results in sluggish kinetics and inferior ion transport efficiency under low temperature, severely restricting their further development and practical applications. In order to deal with the existing issues, the design principles ...

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“…The situation was often observed in vanadium-based cathode materials for ZIBs. [49,50] For example, For V 2 O 3 @C composites as ZIBs cathode, the characteristic peaks of V 2 O 3 crystal still can be detected in ex situ XRD pattern when it is charged to 1.5 V. However, amorphous V 2 O 5 @C hybrid is generated accompanied by the disappear of crystalline V 2 O 3 when the working potential is extended to 1.9 V. [51] Fourth, many publications have proposed that a recrystallized phenomenon of amorphous materials was discovered under electron-beam irradiation (EBI) caused by high current density. The fundamental properties difference between amorphous materials and their crystal counterparts.…”

Section: The Phase Transformation Related To the Amorphous Structurementioning

confidence: 99%

Amorphous Electrode: From Synthesis to Electrochemical Energy Storage

Zhang

Liu

Chen

et al. 2023

Energy & Environ Materials

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Electrochemical batteries and supercapacitors are considered ideal rechargeable technologies for next‐generation energy storage systems. The key to further commercial applications of electrochemical energy storage devices is the design and investigation of electrode materials with high energy density and significant cycling stability. Recently, amorphous materials have attracted a lot of attention due to their more defects and structure flexibility, opening up a new way for electrochemical energy storage. In this perspective, we summarize the recent research regarding amorphous materials for electrochemical energy storage. This review covers the advantages and features of amorphous materials, the synthesis strategies to prepare amorphous materials, as well as the application and modification of amorphous electrodes in energy storage fields. Finally, the challenges and prospective remarks for future development in amorphous materials for electrochemical energy storage are concluded.

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Constructing hollow nanotube-like amorphous vanadium oxide and carbon hybrid via in-situ electrochemical induction for high-performance aqueous zinc-ion batteries

Cited by 37 publications

References 65 publications

Phase‐Stabilized Crystal Etching to Unlock An Oxygen‐Vacancy‐Rich Potassium Vanadate For Ultra‐Fast Zn Storage

Phase‐Stabilized Crystal Etching to Unlock An Oxygen‐Vacancy‐Rich Potassium Vanadate For Ultra‐Fast Zn Storage

Design Strategies and Recent Advancements for Low‐Temperature Aqueous Rechargeable Energy Storage

Amorphous Electrode: From Synthesis to Electrochemical Energy Storage

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