Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 90: Issue 1
High-temperature thermal behaviour of Cr-Doped LiMn2O4 spinels synthesized by the sucrose-aided combustion method
Authors: Rosa Rojas 1 , K. Petrov 2 , G. Avdeev 2 , J. Amarilla 1 , L. Pascual 1 , and J. Rojo 1
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  • 1 Consejo Superior de Investigaciones Científicas, Cantoblanco Instituto de Ciencia de Materiales de Madrid 28049 Madrid Spain
  • | 2 Bulgarian Academy of Sciences Institute of General and Inorganic Chemistry 1113 Sofia Bulgaria
Pages:
67–72
Online Publication Date:
21 Sep 2007
Publication Date:
01 Oct 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-007-8477-x
Keywords:
combustion synthesis; high-temperature thermal behaviour; Li-Cr-Mn oxide spinels; lithium batteries; thermal analysis study
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Abstract  

Chromium doped spinels LiCrYMn2−YO4 (0.2≤Y≤0.8) has been synthesized by the sucrose-aided combustion procedure. The thermal behaviour, phase homogeneity and structural characteristics of the samples were studied by thermal analysis, coupled mass spectrometry, and room-and high-temperature X-ray diffraction methods. It was found that the ‘as prepared’ samples contained residual organic impurities undetectable for X-ray diffraction, that burn out completely at 400°C. Samples treated between 400 and 750°C are single phase spinels, whose crystallites size increase from 10 to 50 nm on increasing the temperature. Cr-doping enhances the thermal stability of the spinels, which augments on increasing the Cr content Y. The enhanced thermal stability of the spinels has been accounted for based on the high excess stabilization energy of Cr3+ in octahedral ligand field.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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