کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1463847 | 989652 | 2008 | 4 صفحه PDF | دانلود رایگان |

Electrochemical properties of LiFePO4/carbon composites were investigated to achieve a high-rate lithium electrode performance. LiFePO4/carbon composites were synthesized by a hydrothermal reaction of a solution of FeSO4·7H2O, H3PO4, and LiOH·H2O mixed with carbon powders under nitrogen atmosphere followed by annealing under 1% H2–99% Ar atmosphere. Particle size of the obtained LiFePO4/carbon composites observed by scanning electron microscopy was less than 100 nm. At a high current density of 1000 mA g−1, the LiFePO4/carbon composites showed a high discharge capacity of 113 mA h g−1, and a flat discharge potential plateau was observed around 3.4 V. The discharge capacity at the high current density, 85% of that at a low current density of 30 mA g−1, is a quite high value for LiFePO4 cathodes. Homogeneous microstructure consisting of small particles contributed to the high-rate properties of the LiFePO4/carbon composites.
Journal: Ceramics International - Volume 34, Issue 4, May 2008, Pages 863–866