Prakash, A. S. ; Manikandan, P. ; Ramesha, K. ; Sathiya, M. ; Tarascon, J. M. ; Shukla, A. K. (2010) Solution-combustion synthesized nanocrystalline Li4Ti5O12 as high-rate performance Li-ion battery anode Chemistry of Materials, 22 (9). pp. 2857-2863. ISSN 0897-4756
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Official URL: http://pubs.acs.org/doi/abs/10.1021/cm100071z
Related URL: http://dx.doi.org/10.1021/cm100071z
Abstract
Nanocrystalline Li4Ti5O12 (LTO) crystallizing in cubic spinel-phase has been synthesized by single-step-solution-combustion method in less than one minute. LTO particles thus synthesized are flaky and highly porous in nature with a surface area of 12 m2/g. Transmission electron micrographs indicate the primary particles to be agglomerated crystallites of varying size between 20 and 50 nm with a 3-dimensional interconnected porous network. During their galvanostatic charge-discharge at varying rates, LTO electrodes yield a capacity value close to the theoretical value of 175 mA h/g at C/2 rate. The electrodes also exhibit promising capacity retention with little capacity loss over 100 cycles at varying discharge rates together with attractive discharge-rate capabilities yielding capacity values of 140 mA h/g and 70 mA h/g at 10 and 100 C discharge rates, respectively. The ameliorated electrode-performance is ascribed to nano and highly porous morphology of the electrodes that provide short diffusion-paths for Li in conjunction with electrolyte percolation through the electrode pores ensuring a high flux of Li.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 81771 |
Deposited On: | 07 Feb 2012 12:17 |
Last Modified: | 07 Feb 2012 12:17 |
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