Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (11): 2587-2592.doi: 10.3866/PKU.WHXB20111124

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Calcination Temperature Effects on the Electrochemical Performance of Li2MnSiO4/C Cathode Material for Lithium Ion Batteries

WEI Yi1, WANG Li-Juan1, YAN Ji1, SHA Ou1, TANG Zhi-Yuan1, MA Li2   

  1. 1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China;
    2. McNair Technology Company, Limited, Dongguan 523800, Guangdong Province, P. R. China
  • Received:2011-07-04 Revised:2011-09-06 Published:2011-10-27
  • Contact: WEI Yi
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (20973124).

Abstract: As a new potential cathode material for lithium ion batteries, Li2MnSiO4/C was synthesized by a solution method. The thermal behavior of the precursor for Li2MnSiO4/C was measured by thermogravimetric (TG) analysis and the range of calcination temperatures from 600 to 800°C was determined. X-ray powder diffraction (XRD) patterns indicated that all the Li2MnSiO4/C samples crystallized in an orthorhombic structure with space group Pmn21. The morphology and particle size of the samples were also characterized by scanning electron microscopy (SEM). The effects of calcination temperature on the electrochemical performance of Li2MnSiO4/C were studied using galvanostatic charge-discharge measurements at various current densities. The results showed that the sample prepared at 700°C exhibited a much higher coulombic efficiency and better cyclic performance than the other samples.

Key words: Lithium ion battery, Cathode material, Li2MnSiO4, Solution method, Calcination temperature


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