【摘要】 采用柠檬酸+过氧化氢浸出体系从废旧三元锂离子电池正极材料中回收镍、钴、锰，分析了浸出过程中可能发生的反应，分别考察了柠檬酸浓度、过氧化氢质量分数、浸出温度、浸出时间、液固比等因素对正极材料中镍、钴、锰浸出率的影响。在柠檬酸浓度1.5 mol/L、过氧化氢质量分数8%、浸出温度80℃、浸出时间60 min及液固比25 mL/g条件下，金属镍、钴、锰浸出率分别为97.58%、97.35%、96.12%。以乙醇为溶析剂，采用溶析结晶法从浸出液中回收金属，镍、钴、锰结晶率分别为92.34%、93.07%、99.69%。更多还原

【Abstract】 Nickel, Cobalt and Manganese in the cathode materials of spent ternary lithium-ion batteries were recovered by leaching with a combination of citric acid and hydrogen peroxide. The possible reactions during the leaching process were analyzed, and the effects of factors, including citric acid concentration, mass fraction of hydrogen peroxide, leaching temperature, leaching time and liquid-to-solid ratio on the leaching rates of nickel, cobalt and manganese from cathode materials were also investigated. It is found that after 60 min leaching at 80 ℃ with citric acid at a concentration of 1.5 mol/L, hydrogen peroxide at a mass fraction of 8%, and a liquid-to-solid ratio of 25 mL/g, the leaching rates of nickel, cobalt and manganese are 97.58%, 97.35% and 96.12%, respectively. Then, an antisolvent crystallization method is adopted with ethanol as antisolvent agent to recover metals from the obtained leach liquor, leading to the crystallization rates of nickel, cobalt and manganese at 92.34%, 93.07% and 99.69%, respectively.更多还原