Method for green and efficient recovery of waste lithium ion battery positive electrode material by using citrus fruits
A technology of lithium-ion batteries and cathode materials, which is applied in the application field of kitchen waste recycling and can solve problems such as high cost, cumbersome operation, and unfriendly environment
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Embodiment 1
[0022] Use a juicer to squeeze pomelo meat, pour the squeezed pomelo gravy into a centrifuge tube, centrifuge at 8000 rpm for 20 minutes, take out the centrifuge tube, and use a dropper to collect the pomelo gravy from the upper layer into a wide mouth in the bottle. Weigh 0.1 g of lithium iron phosphate and 5 g of pomelo gravy into a reaction bottle and put it into a magnet, put the reaction bottle into an oil bath, dissolve and recover at 140 degrees Celsius for 24 hours, then stop heating and stirring. Take out the reagent bottle and use a magnet to suck out the magnet, pour the reacted solid-liquid mixture into a 10ml centrifuge tube, and centrifuge at 12,000 rpm for 20 minutes. After the centrifugation, take out the centrifuge tube and use a dropper to The upper solution in the centrifuge tube was sucked out and the concentration of metal ions was measured by inductively coupled plasma emission spectrometer and the leaching efficiency was calculated. After analysis, it c...
Embodiment 2
[0024] The specific implementation process is the same as in Example 1, the temperature is changed to 25 degrees centigrade, and other conditions are unchanged. Under the conditions of 25 degrees centigrade and 24 hours, the efficiency of lithium ion electroleaching in lithium iron phosphate by pomelo gravy is 41.9%, and the leaching efficiency of iron ions is 41.9%. 10.5%.
Embodiment 3
[0026] The specific implementation process is the same as in Example 1. The lithium iron phosphate in the positive electrode material of the waste lithium ion battery is changed to lithium cobalt oxide, and other conditions are not changed. Under the conditions of 140 degrees Celsius and 24 hours, pomelo gravy has an effect on the concentration of cobalt ions in lithium cobalt oxide. The leaching efficiency was 73.8%, and the leaching efficiency of lithium ions was 43.1%.
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