期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 137, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.inoche.2021.109188
关键词
Lithium titanate; Sol -gel method; Specific capacity; Lithium ion cells
In this study, lithium titanate (LTO) material was synthesized using the sol-gel method and characterized. The electrochemical evaluation showed that the pristine LTO material retained over 90% of its capacity at a high current rate of 20C.
Lithium titanate, Li4Ti5O12 (LTO), a promising anode material for high power lithium ion (Li-ion) cells, was synthesised by sol-gel method using hydrated titania and lithium carbonate as precursors. The synthesised material was characterised by Fourier-transform infrared spectroscopy and X-ray diffraction methods. The morphology of the material was studied by scanning electron microscopy. The electrochemical evaluation of LTO electrode in Li-ion cells was carried out by assembling LTO electrode versus Li metal as counter electrode in half cell. The cell was subjected to initial charge-discharge cycles at C/10 rate and then tested at different rates viz. C/ 5, C/2, 1C, 2C, 5C, 10C and 20C. The specific capacity at these rates was 170, 167, 165, 164, 161, 160, 160 and 155 mAh/g, respectively. The columbic efficiency of the cell was close to 100% at these rates. Herein, we demonstrate that a pristine LTO formed by simple sol-gel method can retain more than 90% of the capacity at high current rate of 20C.
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