Lithium battery recycling technology and status quo

Lithium battery recycling technology and status quo. The environmental protection and harmless treatment of lithium batteries meet the requirements of sustainable development. A large number of lithium batteries have entered the market, and the recycling and reuse of waste lithium batteries has become a major challenge facing the industry. What are the technical means of lithium battery recycling? There are two typical follow-up paths for lithium battery recycling: cascade utilization or direct material recycling. Lithium battery. Jpeg1. Cascade utilization and material recycling decommissioned power lithium batteries use roads and use material recycling after ladders; the batches of directly recycled materials are too small, there is no historical record to check, and the safety monitoring is unqualified. The pursuit of economic benefits is the driving force of company and social behavior. According to this principle, the value of the battery can be maximized only when the usable value of the lithium battery is reduced below the maintenance cost. But the reality is that the traceability of early power lithium-ion batteries was poor, with uneven quality and models. In the early stage, there are certain risks in the cascade utilization of batteries, and the cost of eliminating risks is high. Therefore, it can be said that in the early stage of power lithium-ion battery recycling, the important probability of battery recycling is the recycling of raw materials. 2. The method of extracting valuable metals from cathode materials The so-called power lithium battery recovery, in fact, has not realized the recovery of various materials on the entire battery. The main types of cathode materials include lithium cobalt acid, lithium manganese acid, ternary lithium, and lithium iron phosphate. The cost of battery cathode material accounts for more than 1/3 of the cost of a single battery. However, because the current cathode uses more carbon materials, such as graphite, lithium titanate Li4Ti5O12, silicon carbon anode Si/C, etc., the application is less, the current battery recycling technology is mainly focused on the recovery of battery anode materials. The main methods for recycling used lithium batteries include physical, chemical and biological methods. Compared with other methods, hydrometallurgy has the advantages of low energy consumption, high recovery efficiency, and high product purity, and is considered to be an ideal recovery method. Hydrometallurgy Hydrometallurgy is the use of appropriate chemical reagents to separate metal elements in the leaching solution and selectively dissolve the cathode materials of waste lithium batteries. The hydrometallurgical process is more suitable for recycling waste lithium batteries with a relatively single chemical composition. It can be used alone or in combination with high temperature metallurgy, with low equipment requirements and low processing costs. It is a very mature treatment method, suitable for the recycling of small and medium-sized waste lithium batteries. 4. PyrometallurgyPyrometallurgy, also called combustion or dry metallurgy, eliminates the organic binder of the electrode material through high-temperature combustion, and at the same time causes the oxidation-reduction reaction of metals and their compounds, and condenses and recovers low-boiling form metals and Recycling of its compounds, metal slag screening, pyrolysis, magnetic separation, or chemical methods. Pyrometallurgy is suitable for large-scale production of complex lithium batteries due to its low requirements for raw materials. Current status of lithium battery recycling At present, my country's waste lithium battery recycling system is not perfect, and recycling technologies and business models have not yet reached mature standards. At present, my country's lithium battery recycling industry still has problems such as immature technology, imperfect acquisition network, imperfect management measures, and inadequate support policies. The business model and profit model need to be explored. The cascade utilization system is still the biggest problem in the field of waste lithium battery recycling. At present, there are no clear standards for the extent to which the battery capacity can be used in the next step, and the extent to which the battery capacity cannot be used in the next step, and should be recycled. At present, high-quality lithium iron phosphate batteries are not widely used in cascading applications in early power lithium-ion batteries, and other batteries, including ternary batteries, are of no use value. After a ternary lithium battery is used for a period of time, it is difficult to ensure the uniformity of the electrochemical performance of the internal materials of the battery, so there is a safety hazard in cascade use. The cost of disassembling the battery pack has increased dramatically, and it is only valuable if the battery pack has not been disassembled and used directly. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Basic knowledge of mobile phone lithium batteries