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Structure Characterization and Electrochemical Characteristics of Carbon Nanotube- Spinel Li4Ti5O12 Nanoparticles

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Abstract

Carbon nanotube-spinel lithium titanate (CNT-Li4Ti5O12) nanoparticles have been synthesized by hydrothermal reaction and higher-temperature calcinations with LiOH·H2O and TiO2 precursors in the presence of carbon nanotubes sources. The CNT-Li4Ti5O12 nanoparticles have been characterized by X-ray diffraction (XRD), high angle annular dark field (HAADF) images, and selected area electron diffraction (SAED). The particles exhibited a spinel cubic crystal phase and homogenous size distribution, with sizes around 50-70 nm. HAADF imaging confirmed that carbon content exists on the surface of the CNT-Li4Ti5O12 nanoparticles with graphitic carbon coating of 3-5 nm thickness under 800°C in the Ar gas. The graphitic carbon phase was further confirmed with Raman spectroscopy analysis on powder samples. Electrochemical characteristics were evaluated with galvanostatic discharge/charge tests, which showed that the initial discharge capacity is 172 mA·h/g at 0.1C. The nanoscale carbon layers uniformly coated the particles, and the interconnected carbon nanotube network is responsible for the improved charge rate capability and conductivity.

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Acknowledgments

The Postgraduate Scholarship from Natural Sciences and Engineering Research Council of Canada (NSERC) is greatly appreciated by XC Sun

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Canada

    Xiangcheng Sun & B. Cui

  2. Institute of Chemical Sciences, University of Peshawar, Pakistan

    A. Iqbal

  3. Department of Chemistry, University of Waterloo, Waterloo, Canada

    I. D. Hosein & P. V. Radovanovic

  4. Department of Physics and Astronomy, University of Texas, San Antonio, San Antonio, USA

    M. J. Yacaman

  5. National Center for Nanoscience and Technology, Beijing, China

    Z. Y. Tang

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  1. Xiangcheng Sun
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  2. A. Iqbal
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  3. I. D. Hosein
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  4. M. J. Yacaman
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  6. P. V. Radovanovic
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Sun, X., Iqbal, A., Hosein, I.D. et al. Structure Characterization and Electrochemical Characteristics of Carbon Nanotube- Spinel Li4Ti5O12 Nanoparticles. MRS Online Proceedings Library 1440, 13–18 (2012). https://doi.org/10.1557/opl.2012.1411

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  • DOI: https://doi.org/10.1557/opl.2012.1411

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