丁二酸与过氧化氢协同作用在废旧磷酸铁锂电池回收中的应用研究OA

Recycling spent LiFePO4 batteries is crucial for mitigating resource shortages and lowering environmental pollution.Leaching lithium from the spent LiFePO4 batteries using succinic acid-hydrogen peroxide system was investigated.The effects of succinic acid concentration,hydrogen peroxide volume fraction,solid mass to liquid volume ratio,leaching temperature and time on lithium leaching rate were examined.The leaching mechanism was further clarified through kinetic analysis and SEM.The results indicate that under the optimal leaching conditions of succinic acid of 0.8 mol/L,hydrogen peroxide of 2％,solid mass to liquid volume ratio of 4 mg/1 mL,leaching temperature of 80℃,and time of 40 min,the conditions,lithium leaching rate is more than 98％,while iron leaching rate is less than 2％.Kinetic analysis reveals that the leaching process is primarily diffusion-controlled.Overall,these findings demonstrate that the synergistic succinic acid-hydrogen peroxide system offers high efficiency and sustainability in LiFePO4 leaching,providing a feasible route for the green recycling of spent LiFePO4 batteries.