Synthesis and Electrochemical Properties of LiFe0.95Ti0.05Po4/(C+LiFeP2O7) Composite Material

Abstract:

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A new LiFePO4-based phase composite LiFe0.95Ti0.05PO4/(C+LiFeP2O7)was synthesized by solid state method . The amorphous carbon and phosphate LiFeP2O7 consisted of the protective layer and coated the surface of the solid solution LiFe0.95Ti0.05PO4 The phosphate LiFeP2O7 was detected though XRD(X-ray diffraction)and CV(cyclic voltammetry).Morphology of the composite was observed by scanning electron microscope(SEM)and Transmission electron microscopy (TEM), it illustrated Ti4+ had been induced into the crystal lattice of LiFePO4 and formed the solid solution LiFe0.95Ti0.05PO4.The data of charge-discharge tests showed the composite had excellent electrochemical properties. Initial charge and discharge capacity of LiFe0.95Ti0.05PO4/(C+LiFeP2O7) had reached 157.9mAh/g and 155.2mAh/g at the rate of 0.1 C, respectively. At 1C, the discharge capacity of the composite remained 125mAh/g after 100 cycles.

Info:

Periodical:

Advanced Materials Research (Volumes 160-162)

Edited by:

Guojun Zhang and Jessica Xu

Pages:

1588-1595

DOI:

10.4028/www.scientific.net/AMR.160-162.1588

Citation:

Z. Y. Chen et al., "Synthesis and Electrochemical Properties of LiFe0.95Ti0.05Po4/(C+LiFeP2O7) Composite Material", Advanced Materials Research, Vols. 160-162, pp. 1588-1595, 2011

Online since:

November 2010

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$35.00

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