Citation: ZHOU Xiao-Ling, HUANG Rui-An, WU Zhao-Cong, YANG Bin, DAI Yong-Nian. Synthesis and Electrochemical Properties of High-Rate Spinel Li₄Ti₅O_l2/TiN Anode Material for Lithium-Ion Batteries[J]. Acta Physico-Chimica Sinica, ;2010, 26(12): 3187-3192. doi: 10.3866/PKU.WHXB20101212 shu

Synthesis and Electrochemical Properties of High-Rate Spinel Li₄Ti₅O_l2/TiN Anode Material for Lithium-Ion Batteries

1.
National Engineering Laboratory for Vacuum Metallurgy, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, P. R. China

Received Date: 25 June 2010
Available Online: 2 November 2010
Fund Project: 云南省自然科学基金(2009CD024)资助项目 (2009CD024)

Spinel Li₄Ti₅O_l2/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 Li₄Ti₅O_l2 for lithium-ion batteries was studied. The Li₄Ti₅O_l2/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 Li₄Ti₅O_l2 and was of sub-micron size. The initial specific discharge capacity of the Li₄Ti₅O_l2/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 Li₄Ti₅O_l2/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).
- Lithium-ion battery,
- Spinel Li₄Ti₅O_l2,
- TiN film,
- Anode material,
- Sol-gel processing,
- Polyethylene glycol
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沈阳化工大学材料科学与工程学院沈阳 110142

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Electrochemical Properties of High-Rate Spinel Li₄Ti₅O_l2/TiN Anode Material for Lithium-Ion Batteries