Nickel ferrite beehive-like nanosheets for binder-free and high-energy-storage supercapacitor electrodes

Edmund Samuel, Ali Aldalbahi, Mohamed El-Newehy, Hany El-Hamshary, Sam S. Yoon

Research output: Contribution to journalArticle

Abstract

Herein, we present the facile growth of beehive-like NiFe2O4 nanosheets over Ni nanocones for shorter electron transport distances in supercapacitor electrodes. The electrodeposited ultrathin nanosheets provide excellent electrode–electrolyte interfacial areas, thereby enabling superior electrochemical performances. Notably, the deposition duration is tuned to achieve abundant energy storage sites and controlled cavities for adequate electrolytic ion diffusion. The synergy of these advantageous cavities and active sites of beehive-like NiFe2O4 nanosheets yields excellent stability with a capacitance retention of 95.3% after 10, 000 charging and discharging cycles of the nanosheet-based supercapacitor electrodes. At a high galvanostatic current rate of 5 A g−1, the capacitance was 483 F g−1. The optimal two-dimensional ultrathin NiFe2O4 beehive nanostructure exhibits immense potential for high-energy-storage supercapacitor electrodes, paired with the required pseudocapacitive characteristics.

Original languageEnglish
Article number156929
JournalJournal of Alloys and Compounds
Volume852
DOIs
Publication statusPublished - 2021 Jan 25

Keywords

  • Beehive-like nanosheets
  • Electrodeposition
  • Nickel-iron oxide
  • Supercapacitor

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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