What are the essentials for accepting used lithium iron phosphate batteries?

1. Ladder operation and raw materials use retired power lithium-ion batteries. For those who take the ladder operation, the materials are accepted after the ladder operation; the direct materials are those with too small batches, no history to check, and security monitoring failures. Wait. The pursuit of economic benefits is the driving force of company and social behavior. According to the principle, the cascade operation, until the operable cost of the battery drops below the maintenance cost, and then the raw materials are accepted, the battery cost is maximized. However, the actual environment is that the traceability of early power lithium batteries was poor, and the quality and models were skewed. Early battery cascade operation risks are high, and the cost of eliminating risks is high. Therefore, it can be said that in the early stage of the acceptance of power lithium batteries, the rate of battery removal is mainly based on the acceptance of raw materials. 2 The extraction of valuable metals from the positive electrode material. The current use of power lithium-ion batteries has not achieved the full acceptance and operation of all kinds of materials in the entire battery. The types of positive electrode materials mainly include: lithium cobalt oxide, lithium manganate, ternary lithium, lithium iron phosphate batteries, etc. The material cost of the positive electrode material of the battery accounts for more than 1/3 of the cost of the single battery, and because the negative electrode currently recycles more carbon materials such as graphite, lithium titanate Li4Ti5O12 and silicon carbon negative electrode Si/C are less used, so the current battery acceptance technology is important for It is the material of the battery positive electrode. There are three important categories for the acceptance of used lithium-ion batteries: physical method, chemical method and biological method. Compared with other methods, hydrometallurgy is considered to be a more ambitious method because of its low energy consumption, high acceptance efficiency and high-end product purity. ① The physical method physical method operates the physical and chemical reverberation process to deal with the lithium iron phosphate battery. The most common physical and chemical treatment methods are crushing flotation method and machine grinding method. ②Chemical method The chemical method is the method for handling lithium-ion batteries in the chemical reverberation process. It is generally divided into two methods: pyrometallurgy and hydrometallurgy. ③Bio-method Bio-metallurgy is currently under study, which manipulates the metabolic process of microorganisms to achieve selective leaching of metal elements such as cobalt and lithium. The biological method has low energy consumption, low cost, and the microorganisms can be repeatedly operated with little pollution; but the requirements for the creation of microorganisms are harsh, the creation time is long, the leaching efficiency is low, and the process needs to be further modified. The general treatment method for lithium iron phosphate batteries is that after the battery is destroyed by the machine, the polar organic solvent NMP or strong alkali is used to dissolve the aluminum in the evacuation, and the remaining material is the mixture of LiFePO4 and carbon powder. Li, Fe, and P are introduced into the mixture to adjust the molar ratio of these three elements in the material, and then after ball milling and high temperature calcination under inert air, LiFePO4 material can be synthesized de novo, but with the first synthesized lithium iron phosphate ion Compared with the positive electrode material of the battery, the electric capacity and charging and discharging performance of this material have been reduced. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.