Li4Ti5O12/Li3SbO4/C composite anode for high rate lithium-ion batteries |
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| Authors: | M. Kundu S. Mahanty R.N. Basu |
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| Affiliation: | 1. Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran;2. Materonics and Materionics Research Group, K. N. Toosi University of Technology, Tehran, Iran;3. Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran;1. Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;2. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;3. Department of Physics, Faculty of Science, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia;1. Department of Materials & Metallurgical Engineering, New Mexico Institute of Mining & Technology, 801 Leroy Place, Socorro, NM 87801, USA;2. Department of Functional Materials, Faculty of Engineering Science, University of Bayreuth, 95447 Bayreuth, Germany |
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| Abstract: | Nanocrystalline Li4Ti5O12/Li3SbO4/C composite-prepared by mechanical ball-milling of Li4Ti5O12 (synthesized by aqueous combustion), Li3SbO4 (synthesized by solid state method) and activated carbon, has been investigated as anode in lithium-ion coin cells and compared to pristine Li4Ti5O12. Galvanostatic charge–discharge measurements in the potential window of 0.05–2.0 V show three plateau regions corresponding to Li insertion/extraction in the composite: a large flat plateau at ~ 1.52/1.59 V, followed by a second plateau at ~ 0.75/1.1 V and a sloppy tail at ~ 0.4/0.6 V. While the plateaus at ~ 0.4/0.6 V and ~ 1.52/1.59 V correspond to Li4Ti5O12, the other one at ~ 0.75/1.1 V corresponds to Li3SbO4. At a high rate of ~ 15 C, the capacity for Li4Ti5O12/Li3SbO4/C composite is found to be 105 mAhg?1 retaining ~ 78% of its initial capacity compared to only 58 mAhg?1 (~ 27% of the initial capacity) at 14 C for pristine Li4Ti5O12 up to 100 cycles. Thus, such composite material might find application in lithium-ion batteries requiring high rate of charge and discharge. |
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