Abstract:Orthorhombic LiFePO4/C composite material with olivine structure was prepared by microwave hydrothermal method using FeSO4·7H2O, LiOH·H2O and H3PO4 as raw materials, with glucose as carbon source and modifier. The influence of glucose on the composition, structure, morphology and electrochemical performance of LiFePO4 was investigated by means of XRD, SEM, EDS and constant current charge-discharge cycling. The results show that the as-obtained LiFePO4/C exhibits stronger bonding among Fe, P and O atoms, finer particle size and improved electrochemical properties than the pristine LiFePO4. From the SEM image, the LiFePO4 is coated by carbon in the LiFePO4/C composite. The LiFePO4/C shows the initial discharge capacity of 125.6mAh/g at 0.1C. Even at a rate of 1.0C, it still can deliver a discharge capacity of 106.2mAh/g, the capacity retention is 91.3% after 30 cycles.
夏傲, 于婉茹, 谈国强. 葡萄糖对微波水热合成正极材料LiFePO4的结构和性能的影响[J]. 材料工程, 2016, 44(10): 68-73.
XIA Ao, YU Wan-ru, TAN Guo-qiang. Effect of Glucose on Structure and Properties of LiFePO4 Cathode Material Prepared by Microwave Hydrothermal Method. Journal of Materials Engineering, 2016, 44(10): 68-73.
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