Method for separating and recycling cobalt and nickel from waste lithium-ion battery
A lithium-ion battery, separation and recovery technology, applied in the direction of battery recovery, waste collector recovery, recycling technology, etc., can solve the problems of high economic cost, secondary pollution, low separation efficiency, etc., and achieve efficient recycling and economical recycling cost, the effect of avoiding secondary pollution problems
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Example Embodiment
[0036]
[0037] In this embodiment, a lithium cobalt oxide battery is used as an example to illustrate a method for separating and recovering nickel and cobalt from waste lithium ion batteries.
[0038] Step 1: Manually disassemble the lithium cobalt oxide battery that has been discharged through the discharge process, and the obtained positive electrode material is first washed with anhydrous ethanol for 3 to 5 times, then washed with a large amount of water, and then dried at 60 ° C for 12 hours to obtain a dry positive electrode material.
[0039] Step 2, put the dried positive electrode material into a conical flask for leaching in a water bath constant temperature shaking box at 40°C, the specific operation is as follows: a series of 250mL conical flasks are respectively filled with 180mL 5mol / L formic acid and volume fraction It is an 8vol.% hydrogen peroxide solution, and the volume ratio of the two is 6:1. After that, put the dry positive electrode material into the ...
Example Embodiment
[0047]
[0048] Compared with Example 1, in this implementation, nickel-cobalt is separated and recovered from the nickel-cobalt-manganese ternary battery, and other conditions are the same. The concentrations of nickel and cobalt in the aqueous phase at the outlet of the extraction section were about 243.8 mg / L and 4.9 mg / L, respectively, and the nickel yield was 91.8%; the concentrations of cobalt and nickel in the aqueous phase at the outlet of the stripping section were 285.3 mg / L and 10.2 About mg / L, the cobalt yield can reach 97.2%.
Example Embodiment
[0049]
[0050] Compared with Example 1, P507 is used as the extractant in this implementation, and the volume percentage of P507 and kerosene is 20:80, and the other conditions are the same. The concentrations of nickel and cobalt in the aqueous phase at the outlet of the extraction section were about 247.5 mg / L and 4.2 mg / L, respectively, and the nickel yield was 93.2%; the concentrations of cobalt and nickel in the aqueous phase at the outlet of the stripping section were 287.7 mg / L and 9.6 About mg / L, the cobalt yield can reach 98.0%.
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