Hydrosolvent type lithium iron phosphate battery anode material

Abstract

The invention relates to a battery anode material, concretely relates to a lithium iron phosphate battery anode material, and especially discloses a hydrosolvent lithium iron phosphate battery anode material. An adhesive used in a known lithium iron phosphate battery anode material adopts a polyvinylidene fluoride and methylpyrrolidone solution, and methylpyrrolidone has the disadvantages of corrosion to equipment and human skins, inflammability, explosivity, recovery equipment increase, and needing of baking in the production process, so the known lithium iron phosphate battery anode material has the problems comprising complex production technology and high cost. The problems are solved in the invention. The hydrosolvent lithium iron phosphate battery anode material is composed of 1-2 parts by weight of an adhesive solution, 2-4 parts by weight of carbon black and 94-97 parts by weight of lithium iron phosphate. Deionized water having a low price is adopted in the adhesive as a solvent, so the hydrosolvent lithium iron phosphate battery anode material has the advantages of no corrosion, no pollution, needlessness of baking of raw materials in the production process, simple technology and low cost.

Description

technical field [0001] The invention relates to a battery cathode material, in particular to a lithium iron phosphorus oxide battery cathode material. Background technique [0002] Lithium iron phosphorus oxide battery has become the pride of lithium batteries due to its high energy density and high discharge capacity, as well as excellent cycle characteristics and environmental protection characteristics, and is widely used in electric vehicles. The adhesive polyvinylidene fluoride (PVDF) and the solvent methylpyrrolidone (NMP) in the positive electrode material of the battery are more expensive, PVDF is 100 yuan per kilogram, and NMP is 3300 yuan per kilogram, and NMP is good for copper, iron, and human skin. Corrosion, also has a weak amine smell, flammable and explosive, has a certain pollution to the air, needs to add a recovery system, and a set of this recovery system is about 300,000 yuan, in the process of batching the cathode material of lithium iron phosphorus oxi...

AI Technical Summary

Problems solved by technology

[0002] Lithium iron phosphorus oxide battery has become the pride of lithium batteries due to its high energy density and high discharge capacity, as well as excellent cycle characteristics and environmental protection characteristics, and is widely used in electric vehicles. The adhesive polyvinylidene fluoride (PVDF) and the solvent methylpyrrolidone (NMP) in the positive electrode material of the battery are more expensive, PVDF is 100 yuan per kilogram, and NMP is 3300 yuan per kilogram, and NMP is good for copper, iron, and human skin. Corrosion, also has a weak amine smell, flammable and explosive, has a certain pollution to the air, needs to add a recovery system, and a set of this recovery system is about 300,000 yuan, in the process of batching the cathode material of lithium iron phosphorus oxide battery , all materials need to be baked, and a set of oven costs 100,000 yuan, so the process is complicated and the cost is high