Acta Phys. -Chim. Sin. ›› 2002, Vol. 18 ›› Issue (02): 188-192.doi: 10.3866/PKU.WHXB20020220

• Note • Previous Articles    

Study on Kinetics of Synthesizing Spinel LiMn2O4 for Lithium-ion Battery Cathode

Zhao Ming-Shu;Zhai Yu-Chun;Tian Yan-Wen   

  1. School of Material and Metallurgy, Northeastern University, Shenyang 110004
  • Received:2001-07-23 Revised:2001-10-23 Published:2002-02-15
  • Contact: Zhao Ming-Shu E-mail:zhaomshu@163.net

Abstract: The reaction processes including synthesis of LiMn2O4 with LiOH•H2O and MnO2 were studied by means of DTA under atmosphere pressure, and the result obtained could be applied as an important theoretical basis for preparing LiMn2O4. Table 1~3 show the activation energies of each reaction process obtained by using Doyle-Ozawa method and Kissinger method as follows : 66.3, 72.6, 128.1 and 113.9 kJ•mol-1. Reaction orders and frequency factors were determined by making use of Kissinger method. And the kinetic equations of each reaction were deduced. X-ray diffraction patterns(XRD), scanning electron microscope(SEM)result and size distribution measurements Fig.3~4 show that the synthesized LiMn2O4 possesses pure phase, regular appearance and normal distribution.

Key words: Lithium-ion battery, LiMn2O4, Synthesizing kinetics, Micro-characters