Preparation of carbon encapsulated Li4Ti5O12 anode material for lithium ion battery through pre-coating method |
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| Authors: | Qi Cheng Shun Tang Chang Liu Qian Lan Jinxing Zhao Jiyuan Liang Feng Wei Zu-Qi Liu Yuan-Cheng Cao |
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| Affiliation: | 1.Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering,Jianghan University,Wuhan,China;2.Department of Chemistry and Biochemistry,Ohio State University,Columbus,USA |
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| Abstract: | Carbon encapsulated Li4Ti5O12 (C/Li4Ti5O12) anode material for lithium ion battery was prepared by using the pre-coat method of two steps, and the TiO2 was pre coated before the reaction with Li2CO3. The structure and morphology of the resultant C/Li4Ti5O12 materials were characterized by X-ray diffraction (XRD) and scanning microscopy (SEM). Electrochemical tests showed that at 0.1 C, the initial discharge capacity was 169.9 mAh g?1, and the discharge capacity was 80 mAh g?1 at 5 C. After 100 cycles at 2 C, the discharge specific capacity was 108.5 mAh g?1. Compare with one step coating method, results showed the C/Li4Ti5O12 prepared by pre-coat method can reduce the particle’s size and effectively improve the electrochemical performance. |
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