Synthesis, Characterization, and Li-Electrochemical Performance of Highly Porous Co3O4 Powders

• DOI: 10.1021/cm070048c
• Publication Date: 2007-05-16T12:01:22Z
• Authors: G. Binotto; D. Larcher; A. S. Prakash; R. Herrera Urbina; M. S. Hegde; J-M. Tarascon
• Keywords: Agglomerate; Particle (ecology)

Oxidative precipitation in an aqueous medium of highly self-compacted crystallized Co3O4 dense nanoparticles (4−5 nm) leads to the formation porous micrometric agglomerates exhibiting a well-defined porosity distribution. Postannealing these powders induces drastic reorganizations first because fast removal trapped water and then particles sintering, resulting larger inter-particle voids. Electrochemical behavior this nanometric material precipitated at moderate temperature is found be extremely dependent on way mixing with SP conducting carbon performed; better performances being obtained by soft organic solvent. This textural effect provides stable capacity over cycles (800 mA·h/g) reveals cycle loss same extent as for bulk Co3O4, implying that nanotexturation undergone oxide during their formatting not responsible corresponding initial loss. Through chemical analysis electrolyte we long-term fading our materials can mainly attributed dissolution active within electrolyte.