Separation of Waste Lithium Iron Phosphate Batteries and Regeneration of Positive Electrode Materials
By optimizing the NaOH alkaline solution conditions,the collector binder is efficiently removed and the complete aluminum foil is retained;Regenerate LiFePO4 using solid-state method.When NaOH is 0.8 mol/L,the solid-liquid ratio is 20 mL/g,and the reaction is conducted at 40 ℃ for 10 minutes,the separation rate of the positive electrode material reaches 99.78%.After 1 minute of ultrasound treatment,the aluminum foil recovery is 76%,solving the cumbersome problem of aluminum foil recovery under alkaline solution conditions.The ball milling speed is 500 r,the ball milling time is 5 hours,and 10% high-purity LiFePO4 is added for the solid-state regeneration.The highest discharge specific capacity of the regenerated LiFePO4 is 94.75% of the new material,and after 60 cycles of testing,it is 88.62% of the initial discharge specific capacity.
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NSTL
万方数据
维普
