CSIRO Land and Water, Private Bag 5, Wembley, Western Australia 6913, Australia.
CSIRO Land and Water, Private Bag 5, Wembley, Western Australia 6913, Australia; University of Western Australia, Australia.
Waste Manag. 2018 Apr;74:435-445. doi: 10.1016/j.wasman.2017.12.033. Epub 2018 Jan 6.
Lithium ion battery (LIB) waste contains significant valuable resources that could be recovered and reused to manufacture new products. This study aimed to develop an alternative process for extracting metals from LIB waste using acidic solutions generated by electrolysis for leaching. Results showed that solutions generated by electrolysis of 0.5 M NaCl at 8 V with graphite or mixed metal oxide (MMO) electrodes were weakly acidic and leach yields obtained under single stage (batch) leaching were poor (<10%). This was due to the highly acid-consuming nature of the battery waste. Multistage leaching with the graphite electrolyte solution improved leach yields overall, but the electrodes corroded over time. Though yields obtained with both electrolyte leach solutions were low when compared to the 4 M HCl control, there still remains potential to optimise the conditions for the generation of the acidic anolyte solution and the solubilisation of valuable metals from the LIB waste. A preliminary value proposition indicated that the process has the potential to be economically feasible if leach yields can be improved, especially based on the value of recoverable cobalt and lithium.
锂离子电池 (LIB) 废物中含有大量有价值的资源，可以回收并重新用于制造新产品。本研究旨在开发一种替代工艺，使用电解产生的酸性溶液从 LIB 废物中提取金属进行浸出。结果表明，在 8V 下用石墨或混合金属氧化物 (MMO) 电极电解 0.5M NaCl 产生的溶液呈弱酸性，单级（分批）浸出的浸出率很差（<10%）。这是由于电池废物具有很强的酸性消耗性。用石墨电解质溶液进行多级浸出可以提高浸出率，但电极会随着时间的推移而腐蚀。尽管与 4M HCl 对照相比，两种电解质浸出液的产率都较低，但仍有潜力优化酸性阳极溶液的生成条件和从 LIB 废物中溶解有价值金属的条件。初步的价值主张表明，如果可以提高浸出率，该工艺具有经济可行性，尤其是基于可回收钴和锂的价值。
