Citation: WAN Lu, FU Zhengbing. Preparation and Characterization of Nitrogen-doped Carbon-coated Lithium Titanate Anode for Lithium-ion Batteries[J]. Chinese Journal of Applied Chemistry, ;2018, 35(1): 116-122. doi: 10.11944/j.issn.1000-0518.2018.01.170016 shu

Preparation and Characterization of Nitrogen-doped Carbon-coated Lithium Titanate Anode for Lithium-ion Batteries

WAN Lu ,
FU Zhengbing ^,

College of Chemistry and Materials Science, Hubei Engineering University, Xiaogan, Hubei 432000, China

Corresponding author: FU Zhengbing, ceramic423@163.com
Received Date: 11 January 2017
Revised Date: 6 April 2017
Accepted Date: 6 April 2017

Fund Project: Educational Commission of Hubei Province B2016184National Natural Science Foundation of China 51402096Supported by the National Natural Science Foundation of China(No.51402096), the Educational Commission of Hubei Province(No.B2016184)

Figures(9)

Nitrogen-doped carbon-coated lithium titanate(Li₄Ti₅O₁₂/NC) composites with high performance were prepared via the sol-gel method by using tetrabutyl titanate as the titanium source, lithium monohydrate as the source of lithium, citric acid as carbon source and carbamide as the source of nitrogen. The composites were characterized by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), Focuier transform infrared spectrometer(IR), thermal gravimetric analyzer(TG), scanning electron microscoy(SEM) and transmission electron microscopy(TEM). The results show that the composites are consisted of Li₄Ti₅O₁₂ with a NC coating layer. The Li₄Ti₅O₁₂/NC material with 9.48% of NC exhibits a better electrochemical performance. It delivers a capacity of 212.9 mA·h/g at the first discharge under 1C, after 100 cycles at 1C, it still retains a capacity of 160.1 mA·h/g. The NC coating does not change the material's morphology, but inhibits the growth of composite particles and increases the active site for Li⁺ ion insertion/extraction, and thus improves the rate capacity and electronic conductivity.
- lithium titanate,
- sol-gel method,
- electrochemical performance
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