title: Characterization of nanoparticles of LiMn2O4 synthesized by a one-step intermediate-temperature solid-state reaction.
abstract: Nanoparticles of lithium manganese oxide (LiMn2O4) with a spinel structure have been synthesized by a one-step intermediate temperature solid-state reaction. The influence of the molar ratio of citric acid to the metal ions on the physicochemical properties of LiMn2O4 powders in air has been analyzed by means of X-ray diffraction and electron microscope techniques. The electrochemical behavior of the material has been examined by charge/discharge tests and cyclic voltammetry. Test results reveal that LiMn2O4 particles with lower molar ratios of citric acid to metal ions (1:2) are highly crystalline and highly electrochemically reversible, with better cycle capabilities when compared with a sample with a higher molar ratio (2:1). The LiMn2O4 powders obtained by this method have a uniform morphology with a narrow size distribution.
authors.affiliation: Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, Australia.
authors.forename: Z P
authors.initials: ZP
authors.lastname: Guo
authors.forename: J H
authors.initials: JH
authors.lastname: Ahn
authors.forename: H K
authors.initials: HK
authors.lastname: Liu
authors.forename: S X
authors.initials: SX
authors.lastname: Dou
mesh_terms: D003460:Crystallization / Q000379:methods*; D004553:Electric Conductivity; D008094:Lithium / Q000737:chemistry*; D008345:Manganese / Q000737:chemistry*; D008422:Materials Testing / Q000379:methods*; D008968:Molecular Conformation; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure*; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry*; D044367:Phase Transition; D011208:Powders / Q000138:chemical synthesis / Q000737:chemistry; D013696:Temperature
chemical_list: D010087:Oxides; D011208:Powders; C488552:lithium manganese oxide; D008345:Manganese; D008094:Lithium