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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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Author(s): ZHANG Xin- Long,HU Guo- Rong,PENG Zhong- Dong

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 26;
Issue: 4;
Start page: 443;
Date: 2011;
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Keywords: lithium-ion batterieslithium titanateanode materialsdoping

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 .

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