Electrochemically fabrication of a composite electrode based on tungsten oxide and cobalt on 3D Ni foam for high and stable electrochemical energy storage


PEKSÖZ A., Killi H., Tokgoz S. R. , Carpan M. A.

MATERIALS TODAY COMMUNICATIONS, vol.33, 2022 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 33
  • Publication Date: 2022
  • Doi Number: 10.1016/j.mtcomm.2022.104263
  • Journal Name: MATERIALS TODAY COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Keywords: Electrochemical deposition, Cobalt, Tungsten oxide, Composite material, Energy storage, SUPERCAPACITOR, PERFORMANCE, WO3, NANOTUBES, GRAPHENE, NANOSTRUCTURES, COWO4
  • Bursa Uludag University Affiliated: Yes

Abstract

The present work reports new findings on the electrical energy storage capabilities of WO3/Ni and Co@WO3/Ni electrodes produced via galvanostatic electrochemical deposition. The paper also describes a novel process for cleaning Ni foam, which has significant effect on the electrode's charge accumulation properties. Electro-chemical measurements in an aqueous solution are performed to compare the supercapacitive behavior of the WO3/Ni foam and Co@WO3/Ni foam. The specific capacitance of the former electrode increases from 492.8 to 977.4 F g-1 because of Co adding into tungsten oxide. Furthermore, the former has 42.5% capacitance retention after 7000 charge-discharge cycles, while the latter has 83.7% owing to the Co loading. The specific energies are respectively calculated to be 64.27 Wh kg-1 and 64.44 Wh kg- 1 for the pure WO3/Ni and Co@WO3/Ni elec-trodes. The specific powers are 3761.49 W kg- 1 and 3303.90 W kg- 1 for the former and latter electrodes. Ac-cording to the findings, adding Co to the pure WO3/Ni electrode increases its electrochemical and supercapacitor capabilities, allowing it to be used in energy storage devices.