aa alkaline battery.Waste lithium-ion battery recycling technology

　　Waste lithium-ion battery recycling technology

　　Abstract: By introducing the composition of used lithium-ion batteries and the research progress of waste lithium-ion battery recycling and processing technology in recent years, the current main recycling methods are summarized, including dissolution and separation methods and new methods of direct recycling of cathode materials, and a review of existing research on The existing secondary pollution and safety issues were initially discussed. Lithium-ion batteries, recycling, electronic waste, secondary pollution

　　Lithium-ion batteries are widely used, and their production and consumption are rising year by year. The increasing amount of scrap has put huge pressure on the environment and caused serious pollution. Lithium-ion batteries contain lithium hexafluorophosphate, organic carbonates, copper, cobalt, nickel, manganese and other chemicals. Among them, lithium hexafluorophosphate is highly corrosive and easily decomposes when exposed to water to produce HF. It easily reacts with strong oxidants and burns to produce p2O5; refractory organic solvents and their decomposition and hydrolysis products, such as DME (dimethoxyethane), methanol, Formic acid, etc., these toxic and harmful substances can cause serious pollution to the atmosphere, water, and soil and harm the ecosystem; heavy metals such as cobalt, nickel, and copper have a cumulative effect in the environment, and will eventually harm human beings through the biological chain, which has extremely serious consequences. Great hazard. The plastic or metal casing, electrolyte, electrolyte salt and electrode waste in used lithium-ion batteries all have recycling value.

　　1 Composition of lithium-ion battery

　　2Waste lithium-ion battery dissolution, separation and recycling technology

　　2.1 Dissolution and leaching of electrode materials

　　2.2 Separation and recovery of metal elements in leaching liquid

　　2.3 Research on electrode materials synthesized from leachate

　　3 Direct access to recycling technology for LiCoO2 materials

　　4 Secondary pollution and safety issues

　　5 Summary and Outlook

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