The composite cathode material of Li0.97+δTi0.03Fe0.97Mn0.03 PO4/C was synthesized by carbothermal reduction of FeFe0.97Mn0.03 PO4 which was prepared by co-precipitation method. The samples were characterized by X-ray diffraction, scanning electron microscope, FTIR absorption spectra, and their electrochemical performances were investigated in terms of rate discharge and cycling behavior. The results show that Li0.97+δTi0.03Fe0.97Mn0.03 samples are simple pure olive-type phase, and the particles are homogeneous with average particle size of about 1μm. The ion dopants of Mn4+ and Ti4+ do not affect the structure of the material. Compared with LiFePO4/C, the composite compound Li0.97+δTi0.03Fe0.97Mn0.03 exhibits good electrode properties with discharge capacities of 134.0, 133.4, 130.1 and 127.2mAh·g-1 at 0.2, 1, 5 and 10C rates, respectively. In addition, it shows excellent cycle stability at different rates.
TANG Zhi-Yuan
,
GAO Fei
,
XUE Jian-Jun
. Synthesis and Electrochemical Properties of Li0.97+δTi0.03Fe0.97Mn0.03 PO4/C Composite Cathode Material[J]. Journal of Inorganic Materials, 2008
, 23(2)
: 295
-300
.
DOI: 10.3724/SP.J.1077.2008.00295
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