浸出(土壤学)
草酸
钴
化学
锂(药物)
共晶体系
溶解
选择性浸出
无机化学
硫酸
有机化学
医学
环境科学
合金
土壤科学
土壤水分
内分泌学
作者
Yaozhi Zhang,Fang Wang,Wanxiang Zhang,Shuhang Ren,Yucui Hou,Weize Wu
标识
DOI:10.1016/j.seppur.2023.125498
摘要
The use of green deep eutectic solvents (DESs) to recover valuable metals from spent lithium-ion batteries is both environmentally and economically beneficial. In this work, we proposed a novel method for recovering the cathode material, LiCoO2. LiCoO2 was selectively leached using a DES, comprised of chloroacetic acid and tetrabutylammonium chloride, with oxalic acid added. Cobalt was totally leached, and lithium was converted into Li2C2O4 and precipitated in the DES. After filtration, Li2C2O4 was obtained and the DES with dissolving Co was yielded. When water was added to the DES, cobalt precipitated as oxalate. Finally, after simply evaporating water in the DES, it could continue to be reused as a leaching agent. Importantly, LiCoO2 with a 100% yield could be recovered via the DES recycling process. The mechanism of LiCoO2 leaching with the DES was revealed. We have successfully created a recyclable method that is ecologically benign and acceptable for the lithium-ion battery recycling industry.
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