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Formation of nanometric HT-LiCoO2 by a precipitation and aging process in an alcoholic solution

Larcher, Dominique and Delobel, Bruno and Dantras-Laffont, Lydia and Simon, Evelyne and Blach, Jean-François and Baudrin, Emmanuel Formation of nanometric HT-LiCoO2 by a precipitation and aging process in an alcoholic solution. (2010) Inorganic Chemistry, vol. 49 (n° 23). pp. 10949-10955. ISSN 0020-1669

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Official URL: http://dx.doi.org/10.1021/ic101324e

Abstract

In this paper, we detailed the formation/evolution of precipitates in alcoholic media containing CoII+ and Li+ species, together with the evolution of the composition and structure/texture of the resulting solid phases during the aging process at controlled constant temperature. While the end product is found to be well-crystallized HT-LiCoO2, its formation is shown to result from a two-step process enlisting the initial fast precipitation of β-HCoO2 and then its slow dissolution followed by recrystallization of the lithium-containing material. These results were obtained through combined X-ray diffraction, Raman and IR spectroscopy, elemental and oxidation-state analysis, and high-resolution transmission electron microscopy/selected-area electron diffraction observations. Depending on the cationic concentration, the size of the precipitated material can be controlled within the nanometric range. The electrochemical performances of these aged materials are slightly improved compared to those of the directly precipitated ones that we previously reported. The main limitation of these materials remains the presence of surface protons.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Ecole Centrale de Lille (FRANCE)
Other partners > ESA - ESTEC (NETHERLANDS)
Other partners > Université Lille 1, Sciences et Technologies - Lille 1 (FRANCE)
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Deposited By:INVALID USER
Deposited On:22 Jun 2011 14:59

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