V4C3 MXene-derived Zn0.99V5O12·nH2O nanoribbons as advanced cathodes for ultra-long life aqueous zinc-ion batteries

Wenhai Xiao, Shenghong Yang, Rui Jiang, Qiaofeng Huang, Xiaoyan Shi, Yuen Hong Tsang, Lianyi Shao, Zhipeng Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Aqueous zinc-ion batteries (ZIBs) are of great interest due to their low cost, high safety, and eco-friendly nature. Vanadium oxide is a common cathode material for ZIBs owing to its high capacity. However, its unstable structure and slow ion diffusion kinetics result in poor rate capability and cycling reliability. In this study, three vanadium oxide materials (MxV5O12, M = Zn2+, Co2+, and Ni2+) with a series of pre-inserted cations derived from V4C3 MXene are successfully produced by an easy one-step hydrothermal process. The pre-intercalated Zn2+ creates a larger interlayer spacing and promotes ion diffusion in the interlayer channels. Hence, Zn0.99V5O12·nH2O (ZnVO) nanoribbons with a width of about 100 nm and an interlayer spacing of 13.465 Å exhibit the best Zn2+ storage capacity, including a high reversible capacity (416 mA h g−1) at 0.1 A g−1, good rate capability (188 mA h g−1) at 10 A g−1, and a low decay ratio of 0.000687% per cycle at 5 A g−1 over 15 000 cycles. Flexible packaging batteries also demonstrate a capacity maintenance rate of up to 96% at 1 A g−1 over 350 cycles, showing practical application value. ZnVO offers excellent performance owing to its low charge transfer resistance (Rct), high Zn2+ diffusion coefficient, high capacitive contribution, and excellent reversible phase transition.

Original languageEnglish
Pages (from-to)5530-5539
Number of pages10
JournalJournal of Materials Chemistry A
Volume12
Issue number9
DOIs
Publication statusPublished - 6 Feb 2024

ASJC Scopus subject areas

  • General Chemistry
  • Renewable Energy, Sustainability and the Environment
  • General Materials Science

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