Ball-milling spray regeneration method of waste lithium ion battery positive electrode material

Abstract

The invention discloses a ball-milling spray regeneration method of a waste lithium ion battery cathode material. The method comprises the following steps of detecting the content of each element in waste lithium ion battery nickel cobalt lithium manganate cathode powder, mixing the waste lithium ion battery nickel cobalt lithium manganate cathode powder, a lithium salt, a nickel salt, a cobalt salt, a manganese salt, a binder and an ionic liquid, and carrying out ball-milling refinement in a planetary ball mill; carrying out ball-milling treatment on the mixture to obtain turbid liquid; uniformly stirring the turbid liquid, performing spray drying, and collecting powder; and roasting the obtained powder to obtain a regenerated nickel cobalt lithium manganate positive electrode material. The method is advantaged in that the positive electrode material provided by the invention is clean in regeneration process, low in cost and free of waste water and waste gas emission, valuable metalscan be utilized in a high-valued manner, and meanwhile, the prepared nickel-cobalt-manganese ternary material is high in tap density, good in consistency, controllable in granularity and stable in performance, and has excellent physical and electrochemical properties.

Description

technical field [0001] The invention belongs to the technical field of recovery of waste lithium ion battery anode materials, in particular to a ball milling spray regeneration method for waste lithium ion battery nickel cobalt lithium manganese oxide positive electrode materials. Background technique [0002] Since 2014, my country's new energy vehicles have developed rapidly, and production and sales have shown a high-speed growth trend. According to data from the China Association of Automobile Manufacturers, the sales volume of new energy vehicles in 2018 has reached 1.256 million, which is 16.8 times the sales volume in 2014. It is estimated that the sales volume may reach 2.3 million by 2020. The general scrapping period of lithium iron phosphate batteries is 5 years, and the scrapping period of ternary lithium batteries is 6 years. It is expected that power batteries will enter a large-scale scrapping period at the end of 2019. By 2020, the installed capacity of scrap...

AI Technical Summary

Problems solved by technology

If waste lithium ions cannot be effectively disposed of, it will cause serious harm to the environment and threaten human life, and if valuable metal elements cannot be recycled, a large amount of resources will be wasted, so waste lithium ion batteries In need of recycling

[0003] In recent years, the research on the recycling of waste lithium-ion batteries has been increasing day by day, and there are two major problems in the recycling: one is the removal of impurities in the recycling process, and the other is the recovery rate of effective elements.

These processes also consume a large amount of acid and high energy consumption. At the same time, valuable metals and impurity elements will be leached simultaneously. It is difficult to ensure the phase and electrochemical performance of the recovered positive electrode material, and the recovery rate is low.

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