Recycling method of negative electrode graphite of waste lithium battery
A lithium battery and graphite technology, which is applied in the field of recycling of graphite in the negative electrode of waste lithium batteries, can solve problems such as difficulty in removal, persistent slow biodegradability, biological activity and bioaccumulation, health and ecological environment hazards, etc., to achieve The effect of low running cost
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Embodiment 1
[0023] (1) Place the recovered waste lithium battery in a NaCl solution with a mass concentration of 5% for immersion and discharge for 36 hours. After the discharge, air-dry it naturally, disassemble the dried waste lithium battery manually, and peel off to obtain the negative electrode;
[0024] (2) Scrape off the black graphite on the obtained negative electrode copper foil with tweezers to prepare a graphite catalyst;
[0025] (3) The graphite catalyst is used to treat the solution containing carbamazepine, and the catalyst is added to the carbamazepine solution with a concentration of 2.5mg / L according to the ratio of the graphite catalyst addition amount of 0.01g / L, and potassium hydrogen persulfate is added Amounts are 0.25mmol / L, 0.5mmol / L, 1.0mmol / L respectively, under natural light condition degradation reaction 10min, take a sample every interval 1min, measure the absorbance of carbamazepine solution and calculate removal rate with ultraviolet-visible spectrophotomet...
Embodiment 2
[0027] (1) Place the recovered waste lithium battery in a NaCl solution with a mass concentration of 10% for immersion and discharge for 36 hours. After the discharge, air-dry it naturally, disassemble the dried waste lithium battery manually, and peel off to obtain the negative electrode;
[0028] (2) the black graphite on the negative electrode copper foil obtained is scraped off with tweezers to obtain graphite catalyst;
[0029] (3) Graphite catalyst is used for processing the solution containing carbamazepine, is respectively the ratio of 0.005g / L, 0.010g / L, 0.015g / L, 0.020g / L, 0.030g / L by graphite catalyst addition, The catalyst was added to the carbamazepine solution with a concentration of 2.5 mg / L, the amount of potassium persulfate added was 0.5 mmol / L, and the degradation reaction was carried out under natural light conditions for 10 minutes, and samples were taken at intervals of 1 minute, and measured by UV-visible spectrophotometry The absorbance of carbamazepine...
Embodiment 3
[0031] (1) Place the recovered waste lithium battery in a NaCl solution with a mass concentration of 15% for immersion and discharge for 36 h. After the discharge, let it dry naturally, disassemble the dried waste lithium battery manually, and peel off to obtain the negative electrode;
[0032] (2) the black graphite on the negative electrode copper foil obtained is scraped off with tweezers to obtain a catalyst;
[0033] (3) The graphite catalyst is used to process the carbamazepine solution, and the graphite catalyst is added to the concentration of 1.0mg / L, 2.5mg / L, 5mg / L, and 10mg / L respectively in the carbamazepine solution by 0.01g / L , the amount of potassium persulfate added is 0.5mmol / L, the degradation reaction is carried out under natural light conditions for 10 minutes, and samples are taken at intervals of 1 minute, and the absorbance of the carbamazepine solution is measured by UV-visible spectrophotometry and the removal rate is calculated. The results are shown i...
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