Since the birth of lithium-ion batteries, their excellent performance has quickly established pace in the battery market and has been applied in various industries. In 2000, it began to be popular in mobile phone products, and gradually occupied the 3C consumer electronics market. Lithium-ion batteries are widely used, but few people are aware of recycling. After use, most of them are disposed of as regular garbage. This has caused significant pollution.

Most of the cathode materials of lithium-ion batteries are metal oxides embedded in lithium transitions, among which LiCoO2 is the most widely used, which is also the earliest commercial cathode material for lithium-ion secondary batteries. In addition, in-depth research on lithium-ion battery anode materials, humans mix small amounts of nickel LiCoO2 and use their mixed oxides (currently licoxni1-xo20, the most commonly used lithium-ion battery cathode material with LiCoO2 contains lithium cobalt oxide, lithium method, organic carbonate carbon materials, copper, aluminum and other chemicals. This is because batteries contain a lot of metals, and cobalt is a rare element, but it is found in quite high amounts in lithium-ion batteries. Therefore, the national recycling policy for lithium-ion batteries is important to consider the recycling of metals such as cobalt.

The most important thing for recovery is the application of acid leaching and solvent extraction phase wet gold technology, followed by the use of electrochemical technology to deposition metal in the leaching solution and direct repair of failed electrode materials. Metallurgical technology is an important technology for metal recycling of lithium-ion batteries. Therefore, with the development of metallurgical technology, microbial metallurgy technology is the most mature. So far, this technology has not been used to recycle lithium-ion batteries. With the continuous improvement of environmental requirements, this technology is bound to be widely used in lithium-ion battery recycling.

In the future, the recycling of lithium-ion batteries will require the proper disposal of materials that have an adverse impact on the environment, in addition to recovering useful resources. At the same time, according to the development of lithium-ion batteries and the requirements of the future environment, the processing of lithium-ion batteries in the future will develop in the direction of integration and diversification.