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Acta Phys. -Chim. Sin.  2010, Vol. 26 Issue (12): 3187-3192    DOI: 10.3866/PKU.WHXB20101212
ELECTROCHEMISTRY     
Synthesis and Electrochemical Properties of High-Rate Spinel Li4Ti5Ol2/TiN Anode Material for Lithium-Ion Batteries
ZHOU Xiao-Ling, HUANG Rui-An, WU Zhao-Cong, YANG Bin, DAI Yong-Nian
National Engineering Laboratory for Vacuum Metallurgy, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China
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Abstract  

Spinel Li4Ti5Ol2/TiN was successfully prepared by sol-gel processing using acetylacetone (ACAC) as a chelating ligand and polyethylene glycol (PEG) as a dispersant. The effect of the TiN film on the electrochemical properties of spinel Li4Ti5Ol2 for lithium-ion batteries was studied. The Li4Ti5Ol2/TiN was analyzed by X-ray photoelectron spectroscopy (XPS). X-ray diffraction (XRD) patterns and scanning electron microscope (SEM) images showed that this anode material with the TiN film was pure spinel Li4Ti5Ol2 and was of sub-micron size. The initial specific discharge capacity of the Li4Ti5Ol2/TiN is 173.0 mAh·g-1. When tested at a rate of 0.2C, 1C, 2C, and 5C, it still retained a discharge capacity of 170.6, 147.6, 135.6, and 111.0 mAh·g-1, respectively, after 10 cycles, indicating that Li4Ti5Ol2/TiN had better high-rate performance than that without the TiN film. The positive effect of the TiN film on lithium-ion batteries was also demonstrated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS).



Key wordsLithium-ion battery      Spinel Li4Ti5Ol2      TiN film      Anode material      Sol-gel processing      Polyethylene glycol     
Received: 25 June 2010      Published: 02 November 2010
MSC2000:  O646  
Fund:  

The project was supported by the Natural Science Foundation of Yunnan Province, China (2009CD024).

Corresponding Authors: HUANG Rui-An     E-mail: rahuang2009@gmail.com
Cite this article:

ZHOU Xiao-Ling, HUANG Rui-An, WU Zhao-Cong, YANG Bin, DAI Yong-Nian. Synthesis and Electrochemical Properties of High-Rate Spinel Li4Ti5Ol2/TiN Anode Material for Lithium-Ion Batteries. Acta Phys. -Chim. Sin., 2010, 26(12): 3187-3192.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB20101212     OR     http://www.whxb.pku.edu.cn/Y2010/V26/I12/3187

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