Method for repairing surface defects of lithium iron phosphate positive electrode material by using plasma, lithium iron phosphate positive electrode material and application of lithium iron phosphate positive electrode material

The invention discloses a method for repairing surface defects of a lithium iron phosphate positive electrode material by using plasma, the lithium iron phosphate positive electrode material and application of the lithium iron phosphate positive electrode material, defect repairing is carried out on the surface of a decommissioned lithium iron phosphate positive electrode material through a plasma technology, and the method comprises lithium supplementing and carbon layer repairing. Under the high-energy action of the plasma, lithium can be embedded into the lithium iron carbonate positive electrode material to supplement lithium, and meanwhile, the carbon plasma can improve rapid deposition of carbon on the surface of the material to repair a carbon layer on the surface of the lithium iron phosphate positive electrode material. The method disclosed by the invention is relatively short in time consumption, easy to operate, high in utilization rate of a lithium source, relatively low in cost, high in safety co