对退役动力锂电池正极材料（LiNi_0.5Co_0.2Mn_0.3O₂）优先提锂后的滤渣进行Ni、Co、Mn元素提取，利用（C₈H₁₇O）₂PO₂H（P204）萃取剂在萃取pH为3、萃取相比V（O）∶V（A）=1∶1（有机相和水相体积比）、萃取时间为15 min、萃取级数为3级、盐洗相比V（O）∶V（A）=1∶2、反萃相比V（O）∶V（A）=1∶0.5、反萃时间为15 min、反萃级数3级的条件下萃取Mn，所得Mn回收率为98.6%，MnSO₄纯度为99.5%（质量分数）。利用（C₈H₁₇）₂PO₃H（P507）萃取剂在萃取pH为4.5、萃取相比V（O）∶V（A）=1∶1、萃取时间为10 min、萃取级数为2级、盐洗相比V（O）∶V（A）=1∶2、反萃取相比V（O）∶V（A）=1∶0.5、反萃时间为10 min、反萃级数2级的条件下萃取Co，所得Co回收率为96.5%，CoSO₄纯度为94.9%（质量分数）。利用（C₈H₁₇）₂PO₂H（C272）萃取剂对萃取Mn、Co后的萃余液进行深度除杂后回收Ni元素，所得Ni回收率为96.5%，NiSO₄纯度为97.3%（质量分数）。利用回收得到的电池原材料重新合成电池正极材料，并测试其晶体结构、物理性能和电化学性能，结果表明，合成后的正极材料相关性能指标达到YS/T 798—2012《镍钴锰酸锂》行业标准，具备进入电池行业的条件。

The process of extracting Ni，Co and Mn from the filter residue of preferential extraction of lithium from retired ternary power lithium battery was studied.Using extractant（C₈H₁₇O）₂PO₂H（P204） under the following processing conditions such as extraction pH of 3，extraction V（O）∶V（A）=1∶1，extraction time of 15min，extraction order of 3，salt washing V（O）∶V（A）=1∶2，back extraction V（O）∶V（A）=1∶0.5，back extraction time of 15min，back extraction order of 3，the recycling rate of Mn was 98.6%，while the purity of MnSO₄ was 99.5%.Using extractant（（C₈H₁₇）₂PO₃H（P507） under the following processing conditions such as extraction pH of 4.5，extraction V（O）∶V（A）=1∶1，extraction time of 10 min，extraction order of 2，salt washing V（O）∶V（A）=1∶2，back extraction V（O）∶V（A）=1∶0.5，back extraction time of 10 min，back extraction order of 2，the recycling rate of Co was 96.5%，while the purity of CoSO₄ was 94.9%.After impurities in Mn，Co raffinate were removed with（C₈H₁₇）₂PO₂H（C272） extractant，the recovery rate of Ni was 96.5%，while the purity of NiSO₄ was 97.3%.The battery cathode materials was regenerated by the extracted battery raw materials and their crystal structure，physical properties，electrochemical properties were tested.The results showed that the relevant performance indexes of the synthesized cathode materials met the YS/T 798—2021“Lithium nickel cobalt manganese oxide”industry standards and were qualified to enter the battery industry.