Patent ID: 9564637
Date: 2017-02-07
CPC Classifications: H01M,Y02E

Claim:
1. A method for making a lithium battery cathode composite material comprising: providing a mixed solution comprising a solvent, an iron salt, and a phosphate; adding an alkaline solution in the mixed solution until the mixed solution has a pH value in a range from about 1.5 to about 5; stirring the mixed solution to react the iron salt with the phosphate to form a plurality of iron phosphate precursor particles; heating the plurality of iron phosphate precursor particles to a temperature in a range from about 400° C. to about 700° C. in protective gas; mixing a lithium source solution, a reducing agent, and the plurality of iron phosphate precursor particles to form a lithium iron phosphate precursor slurry; dispersing a plurality of lithium vanadium phosphate particles in the lithium iron phosphate precursor slurry to coat outer surfaces of each of the plurality of lithium vanadium phosphate particles with the lithium iron phosphate precursor slurry to form a plurality of compound precursor particles, wherein the dispersing the plurality of lithium vanadium phosphate particles in the lithium iron phosphate precursor slurry comprises: heating the plurality of compound precursor particles.