Skip navigation
Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/13054
Title: Synthesis and characterization of citric acid assisted Cr doped lithium manganese oxide spinel
Authors: Singh G.
Panwar A.
Sil, Anjan
Sudipto G.
Published in: Ceramics - Silikaty
Abstract: The powders in the system LiCrxMn2-x;O4 (0.0 ≤ x ≤0.5) were synthesized by sol-gel method using citric acid as a chelating agent. The powders were characterized by X-ray diffraction (XRD), Field emission scanning electron microscopy (FESEM), Differential scanning calorimetry (DSC), Impedance spectroscopy (IS) and Electrochemical analysis. Change in particle morphology from truncated octahedral (tetradecahedra) to perfect octahedron for the higher doping concentration of Cr has been reported. Decrease in particle size has been observed with the increase in Cr content. The stability in the crystalline structure Of LiMn2O4 cubic spinel over the temperature range of battery operation was achieved by chromium doping. The electrical conductivity at room temperature of the powdered samples in various compositions studied is of ∼10-5 S/cm. Electrochemical analyses of the materials in all the compositions were carried out in the voltage range of 4.3 V to 3.0 V. The cubic to cubic phase transition in LiMn2O4 which occurs at around 4.15 V can be suppressed by Cr doping. The discharge capacity of the compound is maximum of ∼130 mAh/g for the composition x = 0.0. The capacity decreases with increase in doping concentration and becomes minimum of ∼80 mAh/g atx = 0.5.
Citation: Ceramics - Silikaty (2009), 53(4): 260-267
URI: http://repository.iitr.ac.in/handle/123456789/13054
Issue Date: 2009
Keywords: Differential scanning calorimetry
Discharge capacity
Sol-gel
Spinel structure
X-ray diffraction
ISSN: 8625468
Author Scopus IDs: 57209690740
6701478254
7003754102
35335494400
Author Affiliations: Singh, G., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
Panwar, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
Sil, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
Sudipto, G., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India, Department of Metallurgical and Materials Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
Corresponding Author: Singh, G.; Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, Uttarakhand, India
Appears in Collections:Journal Publications [MT]

Files in This Item:
There are no files associated with this item.
Show full item record


Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.