CRCU

Chemical Research in Chinese Universities ›› 2003, Vol. 19 ›› Issue (3): 344-346.

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A Raman Study of Spinel LiMn2O4

WANG Chun-zhong1, GONG Jie2, LIU Wei1, WEI Ying-jin1, WU Feng3, CHEN Gang1   

  1. 1. Key Laboratory of Automobile Materials of Ministry of Education, Alan G. MacDirmid Institute and College of Materials Science and Engineering, Jilin University, Changchun 130023, P. R. China;
    2. Institute of Condensed Matter Physics, Jilin Normal University, Siping 136000, P. R. China;
    3. Beijing Institute of Technology, Beijing 100081, P. R. China
  • Received:2002-09-11 Online:2003-08-24 Published:2011-08-06
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.50272023), the Special Funds for Major State Basic research Project of China under(No.2002CB211802) and the Research Grant for Ph.D Programs from Ministry of Education(No.20010183031).

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Abstract: A Raman study was carried out for LiMn2O4, which was synthesized via the mixture of Mn3O4 and LiNO3 sintered at different temperatures. It is shown that there are two kinds of Raman spectra for LiMn2O4 at different sintering temperatures, while the X-ray diffraction patterns of LiMn2O4 sintered at different temperatures are the same. Five Raman bands observed for the materials sintered below 500 ℃ are consistent with the theoretical prediction for spinel structure based on the group theory. Only two Raman bands were observed for the materials sintered at temperatures higher than 500 ℃. The best preparation condition for obtaining a good spinel LiMn2O4 is suggested based on the Raman study.

Key words: Raman characterization, Spinel, LiMn2O4