Method for making lithium battery cathode material

A method for making a lithium battery cathode material comprising:

• providing a reactor and a mixed solution including a solvent, an iron salt material, a vanadium source material, and a phosphate material;
• adding the mixed solution and a plurality of micro particles into the reactor, and adding an alkaline solution into the mixed solution until the mixed solution has a pH value ranging from about 1.5 to 5, and stirring the mixed solution to form a plurality of particles of iron phosphate precursor doped with vanadium, wherein the plurality of particles of iron phosphate precursor doped with vanadium is disposed in the mixed solution to form a liquid mixture;
• adding a lithium source solution and a reducing agent into the liquid mixture to form a slurry of lithium iron phosphate precursor doped with vanadium;
• and
• heat-treating the slurry of lithium iron phosphate precursor doped with vanadium to form a plurality particles of lithium iron phosphate doped with vanadium.

A method for making a lithium battery cathode material comprising:

• providing a reactor and a mixed solution including a solvent, an iron salt material, a vanadium source material and a phosphate material;
• adding the mixed solution and a plurality of micro particles into the reactor, and adding an alkaline solution into the mixed solution until the mixed solution has a pH value ranging from about 1.5 to 5, and stirring the mixed solution to form a plurality of particles of iron phosphate precursor doped with vanadium, wherein the plurality of particles of iron phosphate precursor doped with vanadium is disposed in the mixed solution to form a liquid mixture;
• separating the particles of iron phosphate precursor doped with vanadium from the liquid mixture and heating the particles of iron phosphate precursor doped with vanadium to a temperature from about 400° C. to about 700° C.;
• providing a lithium source solution and a reducing agent, and mixing the lithium source solution, the reducing agent and the particles of iron phosphate precursor to form a slurry lithium iron phosphate precursor doped with vanadium;
• heat-treating the slurry of lithium iron phosphate precursor doped with vanadium to form a plurality of particles of lithium iron phosphate doped with vanadium.