Comprehensive recycling method for positive and negative electrodes of scrapped lithium batteries
A technology of positive and negative electrodes and lithium batteries, which is applied in the field of comprehensive recycling of positive and negative electrodes of scrap lithium batteries, can solve the problems of large amount of wastewater treatment, low lithium recovery rate, high energy consumption, etc., and achieve good product quality and strong promotion The effect of high value and comprehensive yield
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[0025] Example 1
[0026] A comprehensive recycling method for the positive and negative electrodes of scrap lithium batteries, the specific steps are as follows:
[0027] Step 1: Discharge the scrapped 18650 nickel-cobalt-manganese cylindrical battery and pass it through a battery crusher in a sealed environment. After two crushings, the first crushing and screening separates the plastic for sale, and the rest is crushed for the second time. The aluminum and copper in the lithium battery are separated from the scrap lithium battery to form an aluminum-copper mixture and sold to the smelter as raw materials, and the remaining solids are converted into positive and negative electrode powders that need to be comprehensively recycled;
[0028] Step 2: After drying the positive and negative electrode powders in a drying kiln at 70-75°C, add oxalic acid and mix them thoroughly in a high-speed mixer to obtain a uniformly mixed material to be reconstituted;
[0029] Step three, the material ...
Example Embodiment
[0036] Example 2
[0037] A comprehensive recycling method for the positive and negative electrodes of scrap lithium batteries, the specific steps are as follows:
[0038] Step 1. After burning the end-of-life soft-pack lithium battery in a rotary kiln at 350°C, the exhaust gas produced is absorbed by an alkaline solvent containing calcium ions for harmless treatment, and then passed through a battery crusher in a sealed environment. The second crushing, where the first crushing and screening separates the plastic for sale, and the rest is crushed for the second time to separate the aluminum and copper in the lithium battery from the scrap lithium battery to form an aluminum-copper mixture and sell it to the smelter as raw material , The remaining solids are converted into positive and negative powders that need to be comprehensively recycled;
[0039] Step 2: After drying the positive and negative electrode powders in a drying kiln at 65-70°C, add sodium sulfite and mix them in a h...
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