Synthesis and Characterization of the Positive Electrode Material LiFePO4/C under Different Microwave Heating Time
The precursors of LiFePO4 were prepared by a sol-gel method using lithium acetate dehyd- rate, phosphoric acid, ferrous sulfate, and citric acid as raw materials. LiFePO4/C cathode material was synthesized by microwave method. The effect of different microwave time on the performance of the resulting LiFePO4/C was investigated. Structural characterization by X-ray diffraction and scann- ing electron microscopy proved that the phase LiFePO4 was synthesized under the optimal conditions of microwave 10 min(600W), the charge-discharge performance indicated that the LiFePO4/C had a maximal specific discharge capacity of 122.5 mAh•g-1 (0.1C) in the first cycle and improve capacity retention. Further AC impendence measurements indicate the sample produced by microwave 10 min shows the low charge transfer resistance.
Jinglong Bu, Pengcheng Wang, Liqun Ai, Xiaoming Sang, Yungang Li
H. Wang et al., "Synthesis and Characterization of the Positive Electrode Material LiFePO4/C under Different Microwave Heating Time", Advanced Materials Research, Vols. 287-290, pp. 1477-1480, 2011