Scalable method for preparing high performance lithium ferromanganese phosphate composite material

Abstract

The invention discloses a method for synthesizing a lithium ferromanganese phosphate composite material. The method produces a lithium ferromanganese phosphate composite material and resolves prior art issues of low molecular surface area and easy water absorption of the product. Furthermore, it minimizes prior method's difficult or expensive steps and lack of flexible control of the iron to manganese ratio within the lithium ferromanganese phosphate compound. In this method, many milling and sintering steps are taken to increase the compound's molecular surface area. Furthermore, selected carbon additives resolve the low conductivity brought about by low molecular surface area. As well, a hydrophobic material is coated on the surface of lithium ferromanganese phosphate to insulate it from outside moisture. Finally, relatively cheap iron sulfate and manganese sulfates are used with oxalate compounds to minimize costs while maximizing control of iron to manganese ratios within the lithium ferromanganese phosphate compound.