Anhui Key Laboratory of Water Pollution Control and Waste Water Recycling, Anhui Jianzhu University, Hefei 230601, China.
Anhui Key Laboratory of Environmental Pollution Control and Waste Resource Utilization, Anhui Jianzhu University, Hefei 230601, China.
Molecules. 2023 Apr 26;28(9):3737. doi: 10.3390/molecules28093737.
HMnO lithium-ion screen adsorbents were synthesized by soft chemical synthesis and solid phase calcination and then applied to the recovery of metal Li and Co from waste cathode materials of a lithium cobalt oxide-based battery. The leaching experiments of cobalt and lithium from cathode materials by a citrate hydrogen peroxide system and tartaric acid system were investigated. The experimental results showed that under the citrate hydrogen peroxide system, when the temperature was 90 °C, the rotation speed was 600 r·min and the solid-liquid ratio was 10 g·1 L, the leaching rate of Co and Li could reach 86.21% and 96.9%, respectively. Under the tartaric acid system, the leaching rates of Co and Li were 90.34% and 92.47%, respectively, under the previous operating conditions. The adsorption results of the lithium-ion screen showed that the adsorbents were highly selective for Li, and the maximum adsorption capacities were 38.05 mg·g. In the process of lithium removal, the dissolution rate of lithium was about 91%, and the results of multiple cycles showed that the stability of the adsorbent was high. The recovery results showed that the purity of LiCl, LiCO and CoCl crystals could reach 93%, 99.59% and 87.9%, respectively. LiCoO was regenerated by the sol-gel method. XRD results showed that the regenerated LiCoO had the advantages of higher crystallinity and less impurity.
HMnO 锂离子筛吸附剂采用软化学合成和固相煅烧法合成，并将其应用于从钴酸锂基电池废阴极材料中回收金属 Li 和 Co。研究了柠檬酸过氧化氢体系和酒石酸体系对阴极材料中钴和锂的浸出实验。实验结果表明，在柠檬酸过氧化氢体系中，当温度为 90°C、转速为 600r·min-1、固液比为 10g·1L-1 时，Co 和 Li 的浸出率分别达到 86.21%和 96.9%。在酒石酸体系中，在之前的操作条件下，Co 和 Li 的浸出率分别为 90.34%和 92.47%。锂离子筛的吸附结果表明，吸附剂对 Li 具有高度选择性，最大吸附容量为 38.05mg·g-1。在锂去除过程中，锂的溶解率约为 91%，多次循环的结果表明吸附剂的稳定性较高。回收结果表明，LiCl、LiCO 和 CoCl 晶体的纯度分别可达 93%、99.59%和 87.9%。采用溶胶-凝胶法再生 LiCoO。XRD 结果表明，再生的 LiCoO 具有较高的结晶度和较少的杂质。
