significant benefits in lowering the production cost high purity olivine powder can be obtained through the method of the present invention the obtained powder shows apparent improvement in the preparation of olivine lifepo 4 based cathode materials then the obtained olivine powder is used as the cathode material of a lithium ion battery to study the cycling performance of the prepared powder the powder obtained from the present embodiment acetylene carbon black and polyvinylidene fluoride pvdf are mixed thoroughly in n methylpyrrolidone nmp solvent according to a weight ratio of 83 10 7 to become slurry the slurry is then tape cast on an al foil and dried followed by punching into disks and used as positive electrodes the positive electrode combines with the lithium metal to construct a coin type cell for cycle life test the cycle life test is performed for 30 cycles by charging discharging the cell within the cut off voltages of 3 0 and 4 3 v with various rates c 10 to 2c rate the results of cycling performance are shown in fig2 the initial capacity of the cell comprised with the cathode material prepared in the present embodiment is 165 mah g as it was cycled with c 10 rate 0 06 ma cm2 at.