Journal of Jishou University(Natural Sciences Edition) ›› 2022, Vol. 43 ›› Issue (3): 72-78.DOI: 10.13438/j.cnki.jdzk.2022.03.012

• Chemistry and chemical engineering • Previous Articles     Next Articles

Preparation of Li4Ti5O12 by Solid-State Method and Exploration of Calcination Temperature

LONG Ruilai,WU Xianming,WU Xiuting,YIN Caishuo   

  1. (College of Chemistry and Chemical Engineering,Jishou University,Jishou 416000,Hunan China)
  • Online:2022-05-25 Published:2022-09-06

Abstract: Li4Ti5O12 powders were prepared by solid-state reaction and two-step calcination method with Li2CO3 and TiO2 as starting materials and anhydrous ethanol as dispersant.The microstructure and morphology of the materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The electrochemical properties of the materials were tested by constant current charge-discharge,AC impedance and cyclic voltammetry.The results show that the pure phase Li4Ti5O12 with complete crystal structure could be synthesized after calcination at 800  ℃ for 6h,and uniform dispersion with particle size of 200~400 nm.The first reversible specific capacity of the Li4Ti5O12 sample was 157.67 mA·h/g at the rate of 0.5 C,and the coulombic efficiency was 96.1%,the capacity retention was 94.3% after 100 cycles.The first reversible specific capacity was 107.0 mA·h/g at the rate of 0.5C,the coulombic efficiency was 96.1% and capacity retention was 84.1% after 1 000 cycles.

Key words: solid-state method, Lithium titanate, Li-ion battery, anode material

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