A 3.9 V polyanion-type cathode material for Li-ion batteries |
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Authors: | Lei LIU Bin ZHANG Xue-jie HUANG |
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Affiliation: | Lei LIU,Bin ZHANG,Xue-jie HUANG Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,100190,China |
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Abstract: | Monoclinic phase LiFeSO4F was synthesized by a simple fast solid state reaction from the mixture of FeSO4·7H2O and LiF pulverized by high energy ball milling. m-LiFeSO4F was confirmed by GITT measurement to be a 3.9 V polyanion-type cathode materials for Li-ion batteries. Its electrochemical activity can be enhanced by addition of carbon. A discharge capacity of 105 mA·h/g (70% of theoretical value) was achieved for a m-LiFeSO4F/CNT composite. Phase separation behavior during lithium extraction and insertion was observed by ex-situ XRD test. |
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Keywords: | LiFeSO_4F polyanion cathode Li-ion battery |
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