SHAJU, K. M.; GUERLOU-DEMOURGUES, Liliane; GODILLOT, Gérôme; WEILL, François; DELMAS, Claude

doi:10.1149/2.036212jes

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SHAJU, K. M.
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GUERLOU-DEMOURGUES, Liliane
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

GODILLOT, Gérôme
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Journal of The Electrochemical Society. 2012, vol. 159, n° 12, p. A1934-A1940

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Co3O4 spinel type nanoparticles (5-10 nm) were synthesized by oxidizing precipitation in various basic solutions. The materials prepared in lithium-containing hydroxide solutions exhibit high electronic conductivity (higher than 10−2 S.cm−1 at room temperature), which can be increased (up to 3 S.cm−1) by electrochemical oxidation. This high conductivity is due to the presence of Co4+ ions in the octahedral framework of the spinel structure, which entails electronic delocalization. In addition to high conductivity, the obtained powder exhibits a high surface area (around 200 m2.g−1), which should be suitable for applications in electrodes: as conductive additive in the positive electrode of alkaline Ni-MH cells, or directly as electrode material in hybrid C/metal oxide supercapacitors.< Leer menos

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Spinel

Cobalt oxide

Batteries

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Strategies for synthesizing conductive spinel cobalt oxide nanoparticles for energy storage applications batteries and energy storage

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