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Preparation of LiMnPO4/C cathode material for lithium ion batteries by a microreactor-solid state process(PDF)


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Preparation of LiMnPO4/C cathode material for lithium ion batteries by a microreactor-solid state process
CHEN YunchaoYU YongWANG GuojingLIU XiaominYANG Hui
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
microreactor solid state process Mn3(PO4)2·3H2O LiMnPO4 carbon coating
Nano-sized LiMnPO4 cathode material was prepared by a microreactor-solid state method.The Mn3(PO4)2·3H2O particles,obtained by mixing two reactant solutions rapidly in a microreactor,were ball-milled with lithium and carbon sources to prepare the precursors,and the mixture was sintered under high temperatures to obtain the product LiMnPO4/C.The effects of various calcination temperatures on the particle size and electrochemical performance of LiMnPO4/C were characterized by X-ray diffraction(XRD),field emission scanning electron microscope(FESEM),transmission electron microscopy(TEM)and galvanostatic charge-discharge test.Results showed that the LiMnPO4/C calcined at 650 ℃ exhibited the smallest particle size and the best electrochemical performance.The initial discharge capacity of this sample was 121 mA·h/g at 0.05C rate(1C=171 mA·h/g),which kept the capacity retention ratio of 86.8% after 20 cycles.


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Last Update: 2017-05-31