Full
Outline
High efficient and selective recovery of lithium from spent LiFePO4 batteries by hydrogen peroxide oxidative leaching method was studied. The effects of hydrogen peroxide concentration, solid mass to liquid volume ratio, leaching temperature and time on the leaching behavior of lithium were examined. Kinetic analysis, XRD and SEM were used to investigate the leaching mechanism. The results show that under the optimal conditions of hydrogen peroxide concentration of 20%, solid mass to liquid volume ratio of 3 mg/1 mL, leaching temperature of 40 ℃ and leaching time of 40 min, the leaching rate of lithium can reach 99%, while the leaching rate of iron is only 0.53%, and the leaching process is mainly controlled by internal diffusion. The method can provide technical support for the efficient selection and recovery of lithium in spent LiFePO4 batteries.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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