A novel recovery process of metal values from the cathode active materials of the lithium-ion secondary batteries
A novel recovery process of metal values from the cathode active materials of the lithium-ion secondary batteries
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DOI：
10.1016/j.hydromet.2009.08.005
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发表时间：
2009-11-01
期刊：
影响因子：
4.7
通讯作者：
Wu, She-Huang
中科院分区：
文献类型：
--
作者：
Wang, Rong-Chi;Lin, Yu-Chuan;Wu, She-Huang
提出了一种从锂离子二次电池正极活性物质中分离回收钴、锰、镍、锂等有价金属的新工艺。在4 M盐酸溶液、80 ℃浸出温度、1h浸出时间和0.02gml（-1）固液比条件下，钴、锰、镍和锂的浸出率可达99%以上。对于混合物的回收过程，首先将浸出液中的Mn与KMnO_4试剂选择性反应并接近完全，将Mn以MnO_2和氢氧化锰的形式回收。其次。用丁二酮肟对浸出液中的镍进行了选择性萃取，几乎完全萃取。第三，除了1 M氢氧化钠溶液之外，达到pH = 11的水溶液允许氢氧化钴的选择性沉淀。水溶液中剩余的Li通过加入饱和Na 2CO 3溶液作为Li 2CO 3沉淀而容易地回收。锂、锰、钴和镍的回收粉末的纯度为96.97、98.23、96.94和97.43重量%，分别(C)2009 Elsevier B. V.保留所有权利。
A novel process was conducted with experiments which separated and recovered metal values such as Co, Mn, Ni and Li from the cathode active materials of the lithium-ion secondary batteries. A leaching efficiency of more than 99% of Co, Mn, Ni and Li could be achieved with a 4 M hydrochloric acid solution, 80 degrees C leaching temperature, I hour leaching time and 0.02 gml(-1) solid-to-liquid ratio. For the recovery process of the mixture, firstly the Mn in the leaching liquor was selectively reacted and nearly completed with a KMnO4 reagent, the Mn was recovered as MnO2 and manganese hydroxide. Secondly. the Ni in the leaching liquor was selectively extracted and nearly completed with dimethylglyoxime. Thirdly, the aqueous solution in addition to the 1 M sodium hydroxide solution to reach pH = 11 allowed the selective precipitation of the cobalt hydroxide. The remaining Li in the aqueous Solution was readily recovered as Li2CO3 precipitated by the addition of a saturated Na2CO3 solution. The purity of the recovery powder of lithium, manganese, cobalt and nickel was 96.97, 98.23, 96.94 and 97.43 wt.%, respectively. (C) 2009 Elsevier B.V. All rights reserved.