Self-assembled Co3O4nanoplatelets into micro-spheres via a simple solvothermal route: Structural and electrochemical properties

M. A. Dar, S. H. Nam, H. S. Abdo, A. A. Almajid, Dong-Wan Kim, A. Qurashi, W. B. Kim

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The self-assembled Co3O4microspheres made of nanoplatelets were prepared by a novel and simple solvothermal route. The crystal structure and morphology were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. The FESEM shows that the average diameter of the microspheres is about 8 μm and the thickness of individual nanoplatelets is 30–70 nm. X-ray photoelectron spectroscopy (XPS) studies reveal two strong peaks appearing at 780.6 and 797.0 eV, corresponding to the core level electrons for Co 2p3/2and Co 2p1/2, which are characteristic XPS peaks of Co3O4phase. The electrochemical properties of cobalt oxide nanoplatelets modified electrodes were scrutinized by cyclic voltammetry (CV) and charge-discharge profile with cycles, showing a stable reversible capacity of 620 mA h/g after 40 cycles.

Original languageEnglish
Pages (from-to)329-336
Number of pages8
JournalJournal of Alloys and Compounds
Volume695
DOIs
Publication statusPublished - 2017

Keywords

  • CoO
  • Cyclic voltammetry
  • Field emission scanning electron microscopy
  • Li-ion batteries
  • Nanostructures
  • Solvothermal method

ASJC Scopus subject areas

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

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