Preparation of LiCoO2 and LiCo1-xFexO2 using hydrothermal reactions

• Published in: Journal of material chemistry Vol. 9; no. 1; pp. 199 - 204
• Main Authors: TABUCHI, M, ADO, K, KOBAYASHI, H, SAKAEBE, H, KAGEYAMA, H, MASQUELIER, C, YONEMURA, M, HIRANO, A, KANNO, R
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 1999
• Subjects: Chemistry; Colloidal state and disperse state; Condensed matter: structure, mechanical and thermal properties; Disperse systems; Exact sciences and technology; General and physical chemistry; Inorganic compounds; Physics; Powders; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides; Cobalt oxide; Iron oxide; XANES; Transition element compounds; Electrochemical cell; Experimental study; Solid solution; X ray diffraction; Powder; Inorganic compound; Ion substitution; Hydrothermal synthesis; Chemical preparation; Magnetic structure; Chemical composition; Lithium oxide; Soft chemistry; Magnetic properties; Crystalline structure
• ISSN: 0959-9428; 1364-5501
• DOI: 10.1039/a805311a

LiCoO2 is an attractive cathode material for rechargeable Li batteries. Iron doped/undoped LiCoO2 powders could be obtained from hydrothermal reactions of either Fe3+ or Co3+ containing coprecipitates or a CoCl2-NaOH-NaClO3 (oxidant) mixture with an excess amount of LiOH.H2O at 220 C for 8-48 h. The LiFexCo1-xO2 solid solution maintained a layered rock-salt structure until x = 0.25. 57Fe Mossbauer and Co K-edge XANES spectra and magnetic susceptibility data reveal that iron and cobalt in the solid solution are in high-spin Fe3+ (S = 5/2) and low-spin Co3+ (S = 0) configurations. 17 refs.