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Preparation and effects of W-doping on electrochemical properties of spinel Li4Ti5O12 as anode material for lithium ion battery

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Abstract

W-doped Li4Ti5O12 in the form of Li4Ti4.95W0.05O12 was firstly synthesized via solid state reaction. X-ray diffraction (XRD) and scanning electron microscope (SEM) were employed to characterize the structure and morphology of Li4Ti4.95W0.05O12. W-doping does not change the phase composition and particle morphology, while remarkably improves its cycling stability at high charge/discharge rate. Li4Ti4.95W0.05O12 exhibits an excellent rate capability with a reversible capacity of 131.2 mA·h/g at 10C and even 118.6 mA·h/g at 20C. The substitution of W for Ti site can enhance the electronic conductivity of Li4Ti5O12 via the generation of mixing Ti4+/Ti3+, which indicates that Li4Ti4.95W0.05O12 is promising as a high rate anode for the lithium-ion batteries.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, Changsha, 410083, China

    Xin-long Zhang  (张新龙), Guo-rong Hu  (胡国荣) & Zhong-dong Peng  (彭忠东)

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  1. Xin-long Zhang  (张新龙)
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  2. Guo-rong Hu  (胡国荣)
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  3. Zhong-dong Peng  (彭忠东)
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Correspondence to Guo-rong Hu  (胡国荣).

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Zhang, Xl., Hu, Gr. & Peng, Zd. Preparation and effects of W-doping on electrochemical properties of spinel Li4Ti5O12 as anode material for lithium ion battery. J. Cent. South Univ. 20, 1151–1155 (2013). https://doi.org/10.1007/s11771-013-1597-5

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  • DOI: https://doi.org/10.1007/s11771-013-1597-5

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