Preparation of carbon encapsulated Li4Ti5O12 anode material for lithium ion battery through pre-coating method

• DOI: 10.1007/s11581-017-2093-y
• Publication Date: 2017-04-07T01:09:34Z
• Authors: Qi Cheng; Shun Tang; Chang Liu; Qian Lan; Jinxing Zhao; Jiyuan Liang; Feng Wei; Zu-Qi Liu; Yuan-Cheng Cao
• Keywords: Lithium titanate; Carbon fibers

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.