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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3632
Title: Preparation and characterization of lithium manganese oxide cubic spinel Li1.03Mn1.97O4 doped with Mg and Fe
Authors: Singh P.
Sil A.
Nath M.
Ray S.
Published in: Physica B: Condensed Matter
Abstract: Spinel powders of Li1.03Mn1.97O4, Li1.03[MgxMn1.97-x]O4, Li1.03[FeyMn1.97-y]O4 and Li1.03[MgxFeyMn1.97-x-y]O4 systems were synthesized by sol-gel technique using lithium acetate, manganese acetate, magnesium acetate, iron nitrate and citric acid as the starting materials. The effect of Mg and Fe substitutions on the structure and surface morphology of spinel Li1.03Mn1.97O4 has been examined by X-ray diffraction (XRD), Field emission scanning electron microscopy (FE-SEM) and Infrared spectroscopy (IR). Electrochemical characteristics such as the cyclic performance was also investigated. The materials for all the compositions exhibit a phase pure cubic spinel structure as evident from the XRD analyses. The crystallinity and average particle size of the material increases by doping with Fe and Mg. The particles of doped samples have truncated octahedral shape. The discharge capacity of Li1.03Mn1.97O4 is 126 mAh/g. The doping increases cyclability; however, the discharge capacity reduces. © 2009 Elsevier B.V. All rights reserved.
Citation: Physica B: Condensed Matter(2010), 405(2): 649-654
URI: https://doi.org/10.1016/j.physb.2009.09.081
http://repository.iitr.ac.in/handle/123456789/3632
Issue Date: 2010
Keywords: Ceramics in electrochemistry
Microstructure
Sol-gel processing
X-ray diffraction and scattering
ISSN: 9214526
Author Scopus IDs: 7403971769
7003754102
7103033909
7402322460
Author Affiliations: Singh, P., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Sil, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Nath, M., Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Ray, S., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Corresponding Author: Sil, A.; Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India; email: asil1fmt@iitr.ernet.in
Appears in Collections:Journal Publications [CY]

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