Method for regenerating anode materials of waste lithium ion secondary battery
A positive electrode material and secondary battery technology, applied in the field of positive electrode material regeneration, can solve the problems of large chemical reagent consumption, complicated separation process, and easy pollution, and achieve significant economic benefits, simple process, and reduce pollution.
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[0021] Example 1:
[0022] The shell of the 17500 type lithium ion secondary battery that failed in the charge-discharge cycle was cut open, the positive electrode piece was sorted out, heated at 400°C for 6 hours in an air atmosphere, and the adhesive was removed; the aluminum foil substrate and the positive electrode were mechanically separated. The materials are separated, and the separated positive electrode material is calcined at 800°C for 5 hours in an air atmosphere to remove conductive agents such as carbon; with Li 2 CO 3 Supplement lithium so that the atomic ratio of lithium and cobalt is 1.05:1.00, mix the positive electrode materials with the adjusted ratio evenly, use a tubular resistance furnace, pre-fire and roast in an air atmosphere, grind through a 38.5 μm sieve to obtain a Reused cathode material LiCoO 2 , the regeneration flow chart of the cathode material of the waste lithium ion secondary battery is as follows figure 1 As shown, the XRD structure of ...
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