Iron-doped nanoflakes of layered double hydroxide of nickel for high-performance hybrid zinc batteries

Sadegh Askari, Davide Mariotti, Paul Brunet, Alexander Vahl, Jan Benedikt

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12 Citations (Scopus)
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Hybrid Zn–air and Zn–M (M represents transition metal oxide/hydroxide) batteries combined at the cell level take the advantages of Zn–air high-capacity and Zn–M high cell voltage. However, the performance of a Zn–air/M battery relies on finding a dual-functional cathode material, which can effectively serve both battery's chemistries. Here, we demonstrate the superior performance of a hybrid battery cathode based on Fe-doped Ni double hydroxide nanoflakes and activated carbon material. Fe doping transforms the disordered crystal structure of Ni hydroxide to a stable hydrotalcite-type structure with significantly enhanced redox conversion capacity, improved electric conductivity, and superior oxygen evolution reaction activity. Therefore, the hybrid battery exhibits a high total energy density, unprecedented energy conversion efficiency (87% at 4 mA/cm 2), and superior power density (100 mW/cm 2 at 60 mA/cm 2) that outperform reported hybrid batteries of other cathode materials. Moreover, the hybrid Zn–air/Ni 1−xFe x–layered double hydroxide battery is featured with the capability of high-rate charging owing to the rapid kinetics of the redox reactions and the excellent catalytic activity of the cathode materials.

Original languageEnglish
Article number100879
Number of pages8
JournalMaterials Today Energy
Early online date11 Oct 2021
Publication statusPublished (in print/issue) - 31 Dec 2021

Bibliographical note

Funding Information:
This work was supported by EPSRC (awards n. EP/M024938/1 and n. EP/M015211/1 ).

Publisher Copyright:
© 2021 Elsevier Ltd


  • Hybrid zinc battery
  • Layered double hydroxide
  • Nickel hydroxide
  • Zinc battery


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