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SYNTHESIS METHOD OF MICRO-SIZED AND POROUS LIFEPO4/C COMPOSITES BY THE TWO-STEP CRYSTALLIZATION PROCESS AND THEIR APPLICATION METHOD TO CATHODE MATERIALS IN LI-ION BATTERIES
SYNTHESIS METHOD OF MICRO-SIZED AND POROUS LIFEPO4/C COMPOSITES BY THE TWO-STEP CRYSTALLIZATION PROCESS AND THEIR APPLICATION METHOD TO CATHODE MATERIALS IN LI-ION BATTERIES
PURPOSE: A preparing method of LiFePO4/C composite is provided to manufacture a LiFePO4/c composite high tap density and excellent high rate-capacity and to manufacture LiFePO4/C of various particle shapes from LiFePO4 seed crystals of various particle sizes and shapes. CONSTITUTION: A preparing method of LiFePO4/C composite comprises: a step of preparing LiFePO4 seed crystal through a hydrothermal synthesis method, a step of dispersing the LiFePO4 seed crystals into a mixture solution of distilled water and ethanol, and additionally putting FeSO47H2O, LiNO3, NH4H2PO4 and sucrose into, and stirring and mixing the materials; and a step of heating the outcome of the previous step in a nitrogen and hydrogen atmosphere.
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