Regeneration method of positive electrode material of waste lithium iron phosphate battery

The invention belongs to the technical field of recycling of waste lithium iron phosphate batteries, and particularly relates to a regeneration method of a positive electrode material of a waste lithium iron phosphate battery. In order to develop a low-energy-consumption and mild-condition regeneration method for the positive electrode material of the waste lithium iron phosphate battery, the waste lithium iron phosphate positive electrode material is directly regenerated through multifunctional lithium carboxymethyl cellulose. In the process flow of regenerating the waste lithium iron phosphate positive electrode material, a large amount of organic solvents and acidic substances are not involved, so that the pollution to the environment is alleviated; in the calcining process of the mixture of the lithium carboxymethyl cellulose and the waste lithium iron phosphate positive electrode material, the lithium carboxymethyl cellulose can be decomposed into a carbon layer while supplementing lithium ions, so that