Journal
JOURNAL OF POWER SOURCES
Volume 97-8, Issue -, Pages 443-446Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0378-7753(01)00635-8
Keywords
LiMn2O4; sol-gel synthesis; citric acid
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Nanoparticles of Lithium manganese oxide (LiMn2O4) spinel oxides have been synthesized from aqueous solutions of metal acetate containing citric acid as a chelating agent by a sol-gel method. The influence of calcination temperature on the physicochemical properties of LiMn2O4 powders in air atmosphere has been analyzed by means of X-ray diffraction (XRD) and electron microscopic techniques. The thermal behavior of the material has been examined by thermogravimetry (TG) and differential thermal analysis (DTA). Two sharp and well-defined peaks obtained from cyclic voltammetry of Li/1 M LiPF6-EC/DEC electrolyte/LiMn2O4 cell reveal that the LiMn2O4 particles are highly crystalline and insertion-extraction mechanism occur at two stages in the 4 V region. (C) 2001 Elsevier Science B.V. All rights reserved.
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