Characterizations on the microstructures of LiMn{sub 2}O{sub 4} prepared by a simple soft-chemical technique
- Division of Material Science and Engineering, Yonsei University, 134 Shinchon-dong, Seodaemoon-gu, Seoul, 120-749 (Korea, Republic of)
- College of Materials Science and Engineering, Jilin University, Changchun 130023 (China)
- Center for Advanced Batteries, Korea Electronics Technology Institute (Korea, Republic of)
LiMn{sub 2}O{sub 4} 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 deg. C was stoichiometric LiMn{sub 2}O{sub 4}, whereas those prepared at 600 and 700 deg. C were Li[Mn{sub 0.77}{sup 3+}Mn{sub 1.23}{sup 4+}]O{sub 4.115} and Li[Mn{sub 0.85}{sup 3+}Mn{sub 1.15}{sup 4+}]O{sub 4.075}. 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{sup -1}.
- OSTI ID:
- 21140765
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Journal Issue: 9 Vol. 59; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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