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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3629
Title: Synthesis and characterization of Li[Mn2-x Mgx]O 4 (x = 0.0-0.3) prepared by sol-gel synthesis
Authors: Singh P.
Sil A.
Nath M.
Ray S.
Published in: Ceramics - Silikaty
Abstract: XRD analysis of Li[Mn2-x Mgx]O4 (x = 0.0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3) powders synthesized by a sol-gel process, shows single phase cubic spinel structure having space group Fd3m up to x = 0.25. When Mg content increases to x = 0.3, second phase with space group P4332 appears. TG (Thermo Gravimetric) analysis shows the oxygen loss from the structure begins at lower temperature as the Mg content increases. DTA (Differential Thermogravimetric Analysis) shows stabilization of orthorhombic LiMnO2 and tetragonal Mn3O4 by Mg doping. Number of vibrational bands increase as the Mg content increases which indicate that the ordering of spinel structure increases and the reduction of the space group from O7h (Fd3m) to O7 (P4332). The discharge capacity of 122 mAh g-1 has been observed for LiMn2O4 and it decreases when the increase in Mg content. In Mg doped samples Li[Mn2-xMgx]O4, step corresponding to cubic-cubic transition decreases and gets completely removed for x = 0.25.
Citation: Ceramics - Silikaty(2010), 54(1): 38-46
URI: http://repository.iitr.ac.in/handle/123456789/3629
Issue Date: 2010
Keywords: Ceramic oxide
Sol-gel technique
Thermogravimetric analysis
X-ray diffraction
ISSN: 8625468
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: Singh, P.; Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
Appears in Collections:Journal Publications [CY]

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