3 results about "Manganese phosphate" patented technology

The invention relates to a surface coating modified lithium ion battery cathode material and a preparation method thereof. The surface coating modified lithium ion battery cathode material has a general chemical formula of LiNi<1-a-b>CoaAlbO2/M, wherein a is more than 0.1 and less than 0.3, b is more than 0.01 and less than 0.2, and M refers to a coating layer. The material is coated by adopting a dry method; the coating layer refers to one or a mixture of two of lithium iron phosphate and lithium ferric manganese phosphate; and the mass ratio of the coating layer to LiNi<1-a-b>CoaAlbO2 is (0.01-0.2):1. The surface coating modified lithium ion battery cathode material and the preparation method thereof disclosed by the invention have the advantages that the stability of the cathode material is improved, and the safety performance of the material is improved; and moreover, in the dry-method coating process, waste liquor is not produced, high-temperature sintering is not needed, and the energy consumption and cost can be reduced.

The invention discloses a synthesis method of battery positive material lithium manganese phosphate. The synthesis method comprises the following steps: adding electrolytic manganese into an acetic acid solution, performing a sealed reaction to form manganese acetate, and discharging hydrogen; adding battery-grade lithium carbonate into phosphoric acid to form lithium dihydrogen phosphate; addingthe prepared lithium dihydrogen phosphate into manganese acetate to synthesize lithium manganese phosphate; circularly applying the evaporated acetic acid to preparation of manganese acetate, and grinding and packaging lithium manganese phosphate. The synthesis method disclosed by the invention has the advantages of simple synthesis technology of lithium manganese phosphate, accurate measurement,no three wastes, low cost, prevention of lots of wastewater hard to deal with and environmental friendliness.