Process Synthesis: Selective Recovery of Lithium from Lithium-Ion Battery Cathode Materials
Process Synthesis: Selective Recovery of Lithium from Lithium-Ion Battery Cathode Materials
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DOI：
10.1021/acs.iecr.8b04899
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发表时间：
2019-01
影响因子：
4.2
通讯作者：
Quan Li;K. Y. Fung;Lingda Xu;Christianto Wibowo;K. Ng
中科院分区：
文献类型：
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作者：
Quan Li;K. Y. Fung;Lingda Xu;Christianto Wibowo;K. Ng
研究了草酸选择性溶解正极材料回收锂的工艺。以LiNi0.5Mn0.3Co0.2O2 （NMC-532）为基本正极材料，研究了温度、酸浓度、料液比等操作参数对锂回收率的影响，使正极材料的锂回收率达到96.3%。然而，也有2.16%的锰被锂溶解。合成了一种基于化学和反溶剂沉淀的综合工艺，从溶解后的液体中分离回收高回收率和高纯度的锰和锂。该方法也被证明适用于其他正极材料，包括不同金属比的LiNixMnyCo1-x-yO2， LiMn2O4和LiCo0.95Mn0.05O2。
A selective dissolution process to recover lithium from cathode materials by oxalic acid was investigated. The chemical reaction responsible for dissolution was identified, and the effects of operating parameters including temperature, acid concentration, as well as solid-to-liquid feed ratio on lithium recovery were studied using LiNi0.5Mn0.3Co0.2O2 (NMC-532) as the base case cathode materials, leading to a lithium recovery of 96.3% from cathode materials. However, 2.16% of manganese was also dissolved with lithium. An integrated process based on chemical and antisolvent precipitation was synthesized to separate and recover manganese and lithium with high recovery and high purity from the liquid after dissolution. This process was also shown to work on other cathode materials including LiNixMnyCo1–x–yO2 of various metal ratios, LiMn2O4 and LiCo0.95Mn0.05O2.