Doping effect on the grain growth of spinel LiMn2O4 prepared by sol-gel methods

作者：Zuo Xiang Qing; Li Huai Xiang^*; Chen Lu Sheng; Zhou Hong Wei; Xia Rong Hua

来源：Chinese Journal of Structural Chemistry, 2007, 26(9): 1017-1022.

• grain growth
• sol-gel
• doping
• activation energy
• LiMn2O4

The cathode-active materials, Li1+yMxMn2-xO4 (M = Al, Co, Ni, Zn, y = 0.02, x = 0.02) powder, were synthesized by sol-gel method using LiOH, Mn(NO3)(2) as the starting materials, citric acid as a carrier and Al(NO3)(3)center dot 9H(2)O or Co(NO3)(2)center dot 6H(2)O or Ni(NO3)(2)center dot 6H(2)O or Zn(NO3)(2)center dot 6H(2)O as dopants. The influence of different doping elements on the structural properties of the as-prepared samples was investigated by X-ray diffraction (XRD), infrared (IR) spectroscopy and scanning electron microscopy (SEM). X-ray diffraction patterns of the prepared samples were identified as the spinel structure with space group Fd3m. The grain size increases gradually as the sintering temperature rises and corresponding activation energies for the grain growth have been estimated using Arrhenius' empirical relation.

• 出版日期2007
• 单位山东师范大学