Boosting the active sites and kinetics of VO2 by Mn pre-intercalated and PVP modified nanostructure to improve the cycle stability for aqueous zinc batteries

Liu, Yanbo; Zou, Yongchun; Guo, Manying; Hui, Zhenxin; Zhao, Lijun

doi:10.1016/j.cej.2021.133528

Cited by 28 publications

(18 citation statements)

References 55 publications

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“…However, it still suffers from a fragile structure and possesses fewer active sites during cycling, which may result in poor ion transfer dynamics and inferior cycling stability. [16] In this regard, the low-valance nature triggers the strategy using in situ self-transformation to electrochemically enable high-rate and ultradurable Zn storage. Of note, the transformation of V 2 O 5 •nH 2 O can be easily induced by structural water insertion, in which the edgesharing corner-connected VO 6 octahedra along the b-axis in VO 2 will be replaced through the oxidation process.…”

Section: Introductionmentioning

confidence: 99%

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

Deng

et al. 2023

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In the lithium‐dominated era, rechargeable Zn batteries are emerging as a competitive alternative. However, the sluggish kinetics of ion diffusion and structural destruction of cathode materials have thus far hampered the realization of future large‐scale energy storage. Herein, an in situ self‐transformation approach is reported to electrochemically boost the activity of a high‐temperature, argon‐treated VO2 (AVO) microsphere for effective Zn ion storage. The presynthesized AVO with hierarchical structure and high crystallinity allows efficient electrochemical oxidation and water insertion to induce self‐phase transformation into V2O5·nH2O within the first charging process, which leads to rich active sites and fast electrochemical kinetics. Using AVO cathode, an outstanding discharge capacity of 446 mAh g−1 at 0.1 A g−1, high rate capability of 323 mAh g−1 at 10 A g−1 and excellent cycling stability for 4000 cycles at 20 A g−1 with high capacity retention are demonstrated. Importantly, such zinc‐ion batteries with phase self‐transition can also perform well at high‐loading, sub‐zero temperature, or pouch cell conditions for practical application. This work not only paves a new route to design in situ self‐transformation in energy storage devices, but also broadens the horizons of aqueous zinc‐supplied cathodes

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Section: Introductionmentioning

confidence: 99%

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

Deng

et al. 2023

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“…[3][4][5] Cathode materials have a critical effect on the electrochemical properties of AZIBs. Therefore, a variety of materials have been explored to serve as cathodes for AZIBs, including manganese-based oxides, 5,6 vanadium-based oxides, [7][8][9] Prussian blue analogs, 10,11 and so on. However, there is still a lack of suitable cathode materials with superior electrochemical properties, which greatly restricts the commercial application of AZIBs.…”

Section: Introductionmentioning

confidence: 99%

High-performance Zn-ion batteries constructed byin situconversion of surface-oxidized vanadium nitride into Zn₃(OH)₂V₂O₇·2H₂O with oxygen defects

Gao

Sheng

et al. 2023

CrystEngComm

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“…To solve vanadium dissolution, many strategies have been proposed, such as electrolyte optimization, − guest species preintercalation, − surface modification, and so on. − Electrolyte optimization has been reported as an effective strategy to prevent V dissolution. Zhang et al designed aqueous organic electrolytes , and high-concentration electrolytes, , which can sustain the stable operation of Zn anodes and diverse cathode materials such as vanadium pentoxide, manganese dioxide, and zinc hexacyanoferrate.…”

Section: Introductionmentioning

confidence: 99%

Atomic Layer-Deposited ZnO Layer on Hydrated Vanadium Dioxide Cathodes against Vanadium Dissolution for Stable Zinc Ion Batteries

2022

ACS Appl. Energy Mater.

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Vanadium oxides are considered one of the most promising cathode materials for aqueous zinc ion batteries. However, vanadium dissolution caused by undesirable side reactions greatly decreases the structure stability and capacity retention. In this work, an atomic layer-deposited ZnO layer is uniformly coated on a hydrated vanadium dioxide nanosheet array cathode, which effectively suppresses the vanadium dissolution and side reactions. The resultant cathode displays improved capacity retentions from 74 to 89% after 100 cycles at 0.5 A g −1 and from 29 to 71% after 990 cycles at 5 A g −1 . Moreover, the structural evolution after electrochemical cycling of the cathode is thoroughly investigated to reveal the protection mechanism. The atomic layer deposition strategy may also be extended to the protection of other cathodes that suffer from the dissolution issue with wide choices of the protection layer materials.

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Boosting the active sites and kinetics of VO2 by Mn pre-intercalated and PVP modified nanostructure to improve the cycle stability for aqueous zinc batteries

Cited by 28 publications

References 55 publications

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

High-performance Zn-ion batteries constructed byin situconversion of surface-oxidized vanadium nitride into Zn₃(OH)₂V₂O₇·2H₂O with oxygen defects

Atomic Layer-Deposited ZnO Layer on Hydrated Vanadium Dioxide Cathodes against Vanadium Dissolution for Stable Zinc Ion Batteries

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Boosting the active sites and kinetics of VO2 by Mn pre-intercalated and PVP modified nanostructure to improve the cycle stability for aqueous zinc batteries

Cited by 28 publications

References 55 publications

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

Self‐Transformation Strategy Toward Vanadium Dioxide Cathode For Advanced Aqueous Zinc Batteries

High-performance Zn-ion batteries constructed byin situconversion of surface-oxidized vanadium nitride into Zn3(OH)2V2O7·2H2O with oxygen defects

Atomic Layer-Deposited ZnO Layer on Hydrated Vanadium Dioxide Cathodes against Vanadium Dissolution for Stable Zinc Ion Batteries

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High-performance Zn-ion batteries constructed byin situconversion of surface-oxidized vanadium nitride into Zn₃(OH)₂V₂O₇·2H₂O with oxygen defects