Optimized Li4Ti5O12 Nanoparticles by Solvothermal Route for Li-Ion Batteries

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Abstract:

Li4Ti5O12 (LTO) nanoparticles were successfully synthesized by solvothermal technique using cost-effective precursors in polyol medium and post-annealed at temperatures of 400, 500, and 600 °C. The XRD patterns of the samples were clearly indexed to the spinel shaped Li4Ti5O12 (space group, Fd-3 m). The particle size and morphology of samples were identified using field-emission SEM. The electrochemical performance of solvothermal samples revealed fairly high initial discharge/charge specific capacities in the range 230–235 and 170–190 mAh/g, at 1 C-rate, while that registered for the solid-state sample has been 160 and 150 mAh/g, respectively. Furthermore, among these samples, LTO annealed at 500 °C exhibited highly improved rate performances at C-rates as high as 30 and 60 C. This was attributed to the achievement of small particle sizes with high crystallinity in nano-scale dimensions and hence shorter diffusion paths combined with larger contact area at the electrode/electrolyte interface.

Keywords: ELECTRODE; LI4TI5O12; LITHIUM BATTERIES; NANOCRYSTAL; SPINEL

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4785

Publication date: August 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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