Patent ID: 8795550
Filing Date: 2014-08-05
Classification: C01B,H01M,Y02E

Abstract:
1. A method for preparing a cathode active material, the method comprising: mixing a phosphorus source material, a lithium source material, and a dispersing agent together to form a first liquid mixture, the dispersing agent is at least one of ethanol and water; adding an iron powder into the first liquid mixture to form a second mixture consisting of iron powder, phosphorus source material, lithium source material, and dispersing agent; stirring the second mixture at a temperature of about 80° C. to about 100° C. for more than about 10 hours; drying the second mixture to achieve a precursor; calcining the precursor in a protective gas at a temperature of about 600° C. to 800° C. for more than about 2 hours to achieve a LiFePO disposing the LiFePO drying the third liquid mixture to achieve a carbon source material coated LiFePO4 crystal; and calcining the carbon source material coated LiFePO