Abstract
Nanocrystalline LiMn 2O 4 spinel was synthesized by a sol–gel method using citric acid as a chelating agent at the calcination temperature of 600°C for 10 h. The as-prepared LiMn 2O 4 was investigated by a variety of techniques, including X-ray powder diffraction, transmission electron microscopy (TEM), and X-ray photoelectron spectra. TEM images indicated that the average crystallite size is about 40 nm with a fairly narrow size-distribution. Results showed that the calcination temperature and the calcination time played significant roles in the formation of nanocrystalline LiMn 2O 4. A possible mechanism on the formation of the nanocrystallites was also discussed.
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