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Preparation and characterization of Ruthenium doped Li4Ti 5O12 anode material for the enhancement of rate capability and cyclic stability
Journal article

Preparation and characterization of Ruthenium doped Li4Ti 5O12 anode material for the enhancement of rate capability and cyclic stability

Yi-Ruei Jhan, Chih-Yuan Lin and Jenq-Gong Duh
Materials Letters, Vol.65(15-16), pp.2502-2505
08/2011
DOI: https://doi.org/10.1016/j.matlet.2011.04.060

Abstract

Anode material Doping Li4Ti5O12 Lithium ion battery Rate capability
Li 4 Ti 5 O 12 and Ru-doped Li 4 Ti 5 O 12 with the formulation of Li 4 Ti 4.99 Ru 0.01 O 12 were prepared by a modified solid-state method. The structure and electrochemical properties of the as-prepared powders were systematically investigated. Li 4 Ti 4.99 Ru 0.01 O 12 exhibited an excellent rate capability with a discharge capacity of 146 mAhg - 1 at 1 C, 126 mAhg - 1 at 5 C, 119 mAhg - 1 at 10 C and even 107 mAhg - 1 at 20 C. Electrochemical impedance spectra (EIS) reveal that the Li 4 Ti 4.99 Ru 0.01 O 12 exhibited the improved electronic conductivity and higher lithium-ion diffusivity than that of Li 4 Ti 5 O 12 . The novel Li 4 Ti 4.99 Ru 0.01 O 12 material stands as a promising potentially high rate anode material for the lithium ion batteries. © 2011 Elsevier B.V. All rights reserved.

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