Preparation and Electrochemical Performance of Li4Ti4.95Al0.05O12/C Anode Materials

doi:10.3724/SP.J.1077.2012.12246

Abstract

Abstract: Li₄Ti₅O₁₂ is a promising anode electrode material in Lithium ion batteries. Using polyacrylamide as template and carbon source, spinel Li₄Ti_4.95Al_0.05O₁₂ and Li₄Ti_4.95Al_0.05O₁₂/C were successfully synthesized by modified solid state method. The results of X-ray diffraction (XRD) and Field-emission scanning electron microscopy show that highly crystalline Li₄Ti_4.95Al_0.05O₁₂ and Li₄Ti_4.95Al_0.05O₁₂/C materials without any impurity are obtained. The shape and size of particles are modified by polyacrylamide. The electrochemical performances of materials are investigated in the range of 1.0–2.5 V. The Li₄Ti_4.95Al_0.05O₁₂/C presents a higher specific capacity and better cycling stability than Li₄Ti_4.95Al_0.05O₁₂. The charge and discharge specific capacity of Li₄Ti_4.95Al_0.05O₁₂/C material are 159.2 and 160.8 mAh/g at 0.2C rate.

Key words: Li₄Ti₅O₁₂, doping, electrochemical performance, AC impedance

CLC Number:

TQ912

DONG Hong-Yu, ZHANG Zhi-Jun, YIN Yan-Hong, YANG Shu-Ting. Preparation and Electrochemical Performance of Li₄Ti_4.95Al_0.05O₁₂/C Anode Materials[J]. Journal of Inorganic Materials, 2012, 27(12): 1251-1255.

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Preparation and Electrochemical Performance of Li₄Ti_4.95Al_0.05O₁₂/C Anode Materials

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