Characterizations on the microstructures of LiMn2O4 prepared by a simple soft-chemical technique

Yingjin Wei, Kwang Bum Kim, Gang Chen, Chul W. Park

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

LiMn2O4 powders were prepared by a simple soft-chemical technique at different temperatures. X-ray diffraction and thermogravimetric analysis suggested that the material prepared at 800 °C was stoichiometric LiMn2O4, whereas those prepared at 600 and 700 °C were Li[Mn0.77 3+Mn1.23 4+]O4.115 and Li[Mn0.85 3+Mn1.15 4+]O4.075. Several typical XRD peaks of the compounds were investigated with an aim to elucidate (i) the Li immigration to the 16d octahedral sites, (ii) the partial tetragonal phase transition of the material and (iii) the mean coherent domain size and microstrain. SEM study showed that the particle size of the materials increased with heating temperature. The activation energy for the material particle growth was determined as 30.4 kJ mol- 1.

Original languageEnglish
Pages (from-to)1196-1200
Number of pages5
JournalMaterials Characterization
Volume59
Issue number9
DOIs
Publication statusPublished - 2008 Sep 1

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microstructure
Microstructure
activation energy
scanning electron microscopy
heating
temperature
diffraction
Powders
X ray diffraction analysis
Thermogravimetric analysis
x rays
Activation energy
Phase transitions
Particle size
Heating
Temperature
Scanning electron microscopy
lithium manganese oxide

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

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abstract = "LiMn2O4 powders were prepared by a simple soft-chemical technique at different temperatures. X-ray diffraction and thermogravimetric analysis suggested that the material prepared at 800 °C was stoichiometric LiMn2O4, whereas those prepared at 600 and 700 °C were Li[Mn0.77 3+Mn1.23 4+]O4.115 and Li[Mn0.85 3+Mn1.15 4+]O4.075. Several typical XRD peaks of the compounds were investigated with an aim to elucidate (i) the Li immigration to the 16d octahedral sites, (ii) the partial tetragonal phase transition of the material and (iii) the mean coherent domain size and microstrain. SEM study showed that the particle size of the materials increased with heating temperature. The activation energy for the material particle growth was determined as 30.4 kJ mol- 1.",
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Characterizations on the microstructures of LiMn2O4 prepared by a simple soft-chemical technique. / Wei, Yingjin; Kim, Kwang Bum; Chen, Gang; Park, Chul W.

In: Materials Characterization, Vol. 59, No. 9, 01.09.2008, p. 1196-1200.

Research output: Contribution to journalArticle

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AB - LiMn2O4 powders were prepared by a simple soft-chemical technique at different temperatures. X-ray diffraction and thermogravimetric analysis suggested that the material prepared at 800 °C was stoichiometric LiMn2O4, whereas those prepared at 600 and 700 °C were Li[Mn0.77 3+Mn1.23 4+]O4.115 and Li[Mn0.85 3+Mn1.15 4+]O4.075. Several typical XRD peaks of the compounds were investigated with an aim to elucidate (i) the Li immigration to the 16d octahedral sites, (ii) the partial tetragonal phase transition of the material and (iii) the mean coherent domain size and microstrain. SEM study showed that the particle size of the materials increased with heating temperature. The activation energy for the material particle growth was determined as 30.4 kJ mol- 1.

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