Study on effect of different manganese sources on LiMn0.6Fe0.4PO4 cathode material
Lithium manganese iron phosphate is prepared by high temperature solid phase process.The effects of different crystalline manganese compounds as manganese sources on lithium manganese iron phosphate cathode materials are investigated.The material is characterized by X-ray diffraction,high resolution scanning electron microscopy and electrochemical performance test.It is founded that the specific discharge capacity of the LiMn0.6Fe0.4PO4@C cathode material prepared with manganese carbonate as manganese source is 155.3 mA·h/g at 0.1 C magnification,the capacity retention rate of the battery is 95.8%after 200 cycles at 1 C magnification,and the compaction density is 2.13 g/cm3.Using manganese tetroxide as manganese source,the specific capacity of the LiMn0.6Fe0.4PO4@C cathode material is 164.55 mA·h/g at 0.1 C magnification,the capacity retention rate of the battery is 97.3%after 200 cycles at 1 C magnification,and the compaction density is 2.25 g/cm3,which is proved to be good electrical performance and compaction density.
lithium-ion batterylithium manganese iron phosphateiron phosphatemanganese carbonatemanganese tetroxide
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