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.
NETL
NSTL
维普
万方数据
