Facile synthesis of self-assembled biporous NiO and its electrochemical properties

M. Muruganandham, Rominder P.S. Suri, Mika Sillanpää, Gang Juan Lee, Jerry J. Wu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In this article, we report the synthesis of self-assembled bi-porous nickel oxide on a large scale without using any templates or matrix. Porous NiO microspheres composed of particles were obtained by thermal decomposition of nickel oxalate, which was prepared using nickel salt and oxalic acid as precursors. The as-obtained nickel oxalate and nickel oxide were characterized using X-ray powder diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), thermogravimetric analysis (TGA), and nitrogen adsorption-desorption analysis. The influence of various experimental conditions on the formation nickel oxalate and NiO were studied. The nitrogen adsorption-desorption analysis showed that the synthesized NiO possesses a biporous (both mesoporous and macroporous) surface structur. The NiO microspheres showed a discharge capacity of 2929 mAh g−1. A plausible mechanism for the NiO self-assembly was proposed.

Original languageEnglish
Pages (from-to)693-701
Number of pages9
JournalElectronic Materials Letters
Issue number5
Publication statusPublished - 1 Sept 2016
Externally publishedYes


  • NiO
  • electrochemcial properties
  • mesoporous material
  • nickel oxalate
  • self-assembly

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials


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