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

doi:10.3724/SP.J.1077.2011.10734

Abstract

Abstract: Mo -doped Li₄Ti₅O ₁₂ in the form of Li₄Ti_4.95Mo_0.05O₁₂ was synthesized via solid state reaction. X-ray diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the structure and morphology of Li₄Ti_4.95Mo_0.05O₁₂. Mo-doping does not change the phase composition and particle morphology, while improves remarkably its cycling stability at high charge/discharge rate. Li₄Ti_4.95Mo_0.05O₁₂ 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 Li₄Ti_4.95Mo_0.05O₁₂ is a promising as a high rate anode for the lithium-ion batteries .

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

CLC Number:

TM911

ZHANG Xin- Long,HU Guo- Rong,PENG Zhong- Dong. Preparation and Effects of Mo-doping on the Electrochemical Properties of Spinel Li₄Ti₅O₁₂ as Anode Material for Lithium Ion Battery[J]. Journal of Inorganic Materials, 2011, 26(4): 443-448.

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

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