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Synthesis of La2NiO4+d oxides by sol–gel process: Structural and microstructural evolution from amorphous to nanocrystallized powders

Fontaine, Marie-Laure and Laberty-Robert, Christel and Verelst, Marc and Pielaszeck, Jerzy and Lenormand, Pascal and Ansart, Florence and Tailhades, Philippe Synthesis of La2NiO4+d oxides by sol–gel process: Structural and microstructural evolution from amorphous to nanocrystallized powders. (2006) Materials Research Bulletin, vol. 41 (n° 9). pp. 1747-1753. ISSN 0025-5408

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Official URL: http://dx.doi.org/10.1016/j.materresbull.2006.02.013

Abstract

In this paper, the structural and microstructural transition from amorphous to La2NiO4+d nanocrystallized oxides synthesized by a polymeric route based on Pechini’s work has been studied by several experimental techniques including infrared spectroscopy and wide angle X-ray scattering. The synthesis parameters which govern this transition have been identified in order to synthesize La2NiO4+d oxides with various mean crystallite sizes and non stoichiometry levels. Therefore, it has been demonstrated that the control of the nature and the content of organic compounds in the polymeric sols allows the preparation of La2NiO4+d metastable phases with a mean crystallite size ranging from 100 to 220 nm and a non stoichiometry level ranging from 0.15 to 0.22 at 25 8C. As the cathodic performance strongly depends on the physical characteristics of the oxides, this study shows that our versatile process may be suitable to elaborate electrodes with different electrochemical behaviours.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Materials Research Bulletin website :http://www.sciencedirect.com/science/journal/00255408
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Polish Academy of Sciences (POLAND)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
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Deposited By:Celine Cabaup

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