Preparation method of lithium iron phosphate electric conduction agent

The invention aims to provide a preparation method of a lithium iron phosphate electric conduction agent. The preparation method provided by the invention comprises the following steps of: taking industrial niobium oxide as a raw material to firstly react with sulfuric acid, preparing the required colloid niobium which has with high activity and high purity and is easy to dissolve in an oxalic acid solution completely through hydrolysis, carrying out a synthetic reaction with oxalic acid and an ammonium oxalate solution, and crystallizing a high-purity ammonium oxalate niobium product for adding of lithium iron phosphate to improve conductibility and charging capacity of the lithium iron phosphate. Through a 4-step preparation reaction, the new electronic grade purity niobium salt is obtained, the method is easy to operate, the reaction is stable, waste water is not generated, the product structure is stable, the water solubility is good, and operating requirements of customers are met.