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Bimetallic oxide nanosheets from nickel-vanadium layered double hydroxide as an efficient cathode for rechargeable nickel-zinc batteries

Rastgoo Deylami, M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1021/acs.energyfuels.1c03104
  3. Publisher: American Chemical Society , 2021
  4. Abstract:
  5. Nickel-zinc batteries as safe and economic energy storage devices suffer from lack of high electrochemical performance of cathode materials. Herein, a new cathode material for rechargeable Ni/Zn batteries is introduced based on various compositions of mixed metal oxide (MMO) through a calcination process of nickel-vanadium layered double hydroxide at different temperatures. The results demonstrated that the prepared sample at 500 °C presents the best electrochemical properties such as a good electrochemical discharge capacity (278.4 mAh g-1 at 0.5 A g-1), good cycle life (capacity retention of 74% after 1000 cycles at 5 A g-1), and excellent rate capability (177 mAh g-1 at 5 A g-1). These improvements can be related to the designed compositions of bimetallic oxides, NiO and Ni3V2O8, the amorphous phase, good morphology, and high structural stability, which lead to enhanced OH- guest ion diffusion in the structure and an increase in the active surface area for electrochemical reactions. It is expected that the introduced novel MMO compound is a promising new effective cathode electrode in rechargeable Ni/Zn batteries for many types of applications toward reliable and safe energy storage devices. © 2021 American Chemical Society
  6. Keywords:
  7. Electric discharges ; Energy storage ; Morphology ; Nickel oxide ; Secondary batteries ; Stability ; Surface reactions ; Vanadium compounds ; Zinc ; Bimetallic oxides ; Calcinations process ; Economic energy ; Electrochemical performance ; Layered-double hydroxides ; Mixed metal oxide ; New cathode material ; Ni/Zn battery ; Nickel-zinc batteries ; Oxide nanosheets ; Cathodes
  8. Source: Energy and Fuels ; Volume 35, Issue 22 , 2021 , Pages 18805-18814 ; 08870624 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acs.energyfuels.1c03104