access icon free Three-dimensional hierarchical nickel-based hydroxides and oxides microspheres and their electrochemical properties

© The Institution of Engineering and Technology
Received 22/05/2013, Accepted 05/09/2013, Revised 30/07/2013, Published

Nickel hydroxides (Ni(OH)2) with various morphologies, including flower-like, walnut-like and particle-aggregated microspheres, have been successfully synthesised by a surfactant-assisted microwave hydrothermal method. NiO microspheres have been obtained by calcining corresponding Ni(OH)2 precursors at 400°C for 2 h. The products were characterised by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy and transform electron microscopy. The electrochemical properties of the NiO microspheres with different morphologies were also investigated.

Inspec keywords: crystal morphology; electrochemistry; nickel compounds; surfactants; thermal analysis; X-ray diffraction; scanning electron microscopy; calcination; infrared spectra; Fourier transform spectra

Other keywords: NiO; particle-aggregated microspheres; electrochemical properties; scanning electron microscopy; temperature 400 degC; nickel hydroxides; time 2 h; NiO microspheres; transform electron microscopy; morphology; surfactant-assisted microwave hydrothermal method; Fourier transform infrared spectroscopy; flower-like microspheres; walnut-like microspheres; oxides microspheres; three-dimensional hierarchical nickel-based hydroxides; Ni(OH)2; X-ray diffraction; thermogravimetric analysis; calcination

Subjects: Other heat and thermomechanical treatments; Infrared and Raman spectra in inorganic crystals; Crystal morphology and orientation; Electrochemistry and electrophoresis; Disperse systems

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