Journal of Inorganic Materials ›› 2011, Vol. 26 ›› Issue (4): 443-448.DOI: 10.3724/SP.J.1077.2011.10734

• Research Letter • Previous Articles    

Preparation and Effects of Mo-doping on the Electrochemical Properties of Spinel Li4Ti5O12 as Anode Material for Lithium Ion Battery

ZHANG Xin- Long,HU Guo- Rong,PENG Zhong- Dong   

  1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China
  • Received:2010-11-01 Revised:2010-12-09 Published:2011-04-20 Online:2011-04-22

Abstract: Mo -doped Li4Ti5O 12 in the form of Li4Ti4.95Mo0.05O12 was synthesized via solid state reaction. X-ray diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the structure and morphology of Li4Ti4.95Mo0.05O12. Mo-doping does not change the phase composition and particle morphology, while improves remarkably its cycling stability at high charge/discharge rate. Li4Ti4.95Mo0.05O12 exhibits an excellent rate capability with a reversible capacity of 117.03 mAh/g at 10 C and even 94.24 mAh/g at 30 C . The substitution of Mo for Ti site can enhance the electronic conductivity of Li4Ti5O12 via the generation of mixing Ti4+/Ti3+, which indicates that Li4Ti4.95Mo0.05O12 is a promising as a high rate anode for the lithium-ion batteries .

Key words: lithium-ion batteries, lithium titanate, anode materials, doping

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