Journal of Inorganic Materials

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Preparation and Key Influencing Factors of Li4Ti5O12 as Electrode Material

XU Jiang-Feng1, LI Jian-Ling1, LI Wen-Sheng2, WANG Xin-Dong1,3   

  1. 1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, China; 2. Jinzhou Kaimei Power Co. Ltd., Jinzhou 121000, China; 3. Beijing Key Lab of Advanced Energy Material and Technology, Beijing 100083, China
  • Received:2006-09-28 Revised:2006-11-23 Published:2007-09-20 Online:2007-09-20

Abstract: Effects of sintering temperature, time and the lithium salts on the properties of Li4Ti5O12 synthesized by a solid-state-method were studied based on orthogonal experiments. The results show that sintering temperature is the most principal factor on the performance of Li4Ti5O12. Synthesized at proper sintering temperature with appropriate time, the product will have good electrochemical properties with finer particle size and better crystallinity. The high-rate discharge/charge property of Li4Ti5O12 prepared with LiNO3 is much better. Li4Ti5O12 obgained at the optimum condition, namely preparing with LiNO3 and sintering at 800℃ for 12h, performs well when charged and discharged with high current density. It delivers discharge capacities of 151mAh·g-1, 140mAh·g-1 and 115mAh·g-1 at the rate of 1C, 2C and 5C, respectively, and shows good reversibility.

Key words: electrode material, Li4Ti5O12, preparation

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