Patent ID: 11942626
Assignee: WATIX TECHNOLOGY LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method for preparing a lithium ferromanganese phosphate composite material comprising the following sequential steps:
(S1) weighing iron sulfate and manganese sulfate according to the stoichiometric ratio of each element in LiMnxFe1-xPO4, whereby 0.1≤X≤0.9, and mixing the iron sulfate and manganese sulfate in water, followed by adding an oxalate compound and a base to precipitate ferromanganese oxalate wherein; the solution is subsequently filtered and the solid is washed with water and then dried;
(S2) mixing and subsequently ball-milling a lithium source, a phosphorus source, a carbon source, and the ferromanganese oxalate (from step S1) in a solvent medium, the resulting solution of which is subsequently spray dried or plough dried; wherein the remaining solid is calcined in an inert atmosphere and cooled to obtain a precursor lithium ferromanganese phosphate material;
(S3) mixing and subsequently ball-milling the product of step S2 in a solvent medium with a dissolved hydrophobic material, followed by spray drying or plough drying, whereby the solid product is subsequently calcined to obtain the lithium ferromanganese phosphate composite material; the described lithium ferromanganese phosphate composite material of which comprises the lithium ferromanganese phosphate material and the carbon and hydrophobic material coating.