Chem. J. Chinese Universities ›› 2018, Vol. 39 ›› Issue (11): 2513.doi: 10.7503/cjcu20180328

• Physical Chemistry • Previous Articles     Next Articles

Li4Ti5O12 Modification by Bifunctional Bionic Membrane as Anode Materials for Lithium-ion Batteries

YANG Shuting1,2,3, LI Qianhui1, FAN Yuchang1, WANG Qiuxian2,3, DU Ting1, YUE Hongyun1,2,3,*()   

  1. 1. School of Chemistry and Chemical Engineering, Henan Normal University,Xinxiang 453007, China
    2. National and Local Joint Engineering Laboratory of Motive Power and Key Materials,Xinxiang 453007, China
    3. Henan Battery Research Institute, Xinxiang 453007, China
  • Received:2018-04-28 Online:2018-11-10 Published:2018-09-29
  • Contact: YUE Hongyun E-mail:yuehongyun@foxmail.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No. U1504211) and the Key Project of Science and Technology Department of Henan Province, China(No. 172102210049).

Abstract:

Anode material with excellent electrochemical properties was obtained by coating the polydopamine(PDA)/Super P(SP) layer with the dual effect of both ionic conduction and electronic conduction on the surface of Li4Ti5O12 particles. The morphology, structure and electrochemical properties of the composites were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(SEM), transmission electron microscopy(TEM), charge-discharge cycle curves, and cyclic voltammetry(CV). The results showed that when the thickness of the coating layer was controlled at about 10 nm and the content of Super P was 3%(mass fraction), the sample displayed an outstanding electrochemical performance: the initial discharge capacity is 175 mA·h/g at 0.2C and the reversible discharge capacity is still above 160 mA·h/g after 150 cycles.

Key words: Li4Ti5O12, Polydopamine, Self-polymerization, Anode, Lithium-ion battery

CLC Number: 

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