微波合成锂离子电池正极复合材料LiFePO4/C电化学性能

Electrochemical performance of LiFePO4 synthesized by microwave processing as lithium battery cathodes

  • 摘要: 采用微波合成技术合成锂离子电池正极材料LiFePO4,并进行碳掺杂,合成出复合材料LiFePO4/C.通过XRD,SEM和恒电流充放电实验,研究了材料结构形貌和电化学性能.结果表明,掺碳量4%时,采用40mA/g进行充放电,材料比容量可以达到109mAh/g,高倍率性能也有一定程度的提高.

     

    Abstract: LiFePO4 cathode materials were prepared by microwave processing with a domestic microwave oven. LiFePO4/C composites were synthesized by carbon-coated to improve the capacity and rate capability. The microstructure and electrochemical performance of the composite were studied by X-ray diffraction, scanning electron microscopy and constant current charge-discharge experiment. The results indicated that the LiFePO4/C composite with 4% carbon exhibited a higher reversible specific capacity of 109 mAh/g at 40 mA/g and an excellent rate capability.

     

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