Du Zeyu, Chen Jialu, Wang Shangjun, An Xiaowei, Wang Peifen, Ma Xuli, Du Xiao, Hao Xiaogang, Luo Qinglong, Li Jun, Guan Guoqing
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China.
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China; Shanxi Jinke Technology Service Company Limited, Taiyuan 030000, China.
Waste Manag. 2024 Mar 1;175:42-51. doi: 10.1016/j.wasman.2023.12.043. Epub 2023 Dec 29.
A new green pathway of in situ electro-leaching coupled with electrochemically switched ion exchange (EL-ESIX) technology was developed for the separation and recovery of valuable metal ions from waste lithium batteries. By using the in situ electro-leaching, the leaching rates of Li and Co from the prepared LiCoO film electrodes reached 100 % and 93.30 %, respectively, under the combined effect of the acidic microenvironment formed by the anodic electrolytic water and electrostatic repulsion. Subsequently, the Li in the electrolyte was further extracted by an electrochemically switched ion exchange (ESIX) process using LiMnO as the film electrode, and Li was further enriched in the eluate by a cyclic adsorption and desorption process. The results indicate that the in situ electro-leaching has significant advantages over powder leaching, and for the recycling of waste lithium batteries, the final lithium recovery rate reached 94.51 % by using this in situ EL-ESIX technology.
开发了一种新的原位电浸出与电化学开关离子交换（EL-ESIX）技术相结合的绿色途径，用于从废旧锂电池中分离和回收有价金属离子。通过原位电浸出，在阳极电解水形成的酸性微环境和静电排斥的共同作用下，制备的LiCoO薄膜电极中Li和Co的浸出率分别达到100%和93.30%。随后，以LiMnO为薄膜电极，通过电化学开关离子交换（ESIX）过程进一步提取电解液中的Li，并通过循环吸附和解吸过程使Li在洗脱液中进一步富集。结果表明，原位电浸出比粉末浸出具有显著优势，对于废旧锂电池的回收利用，采用这种原位EL-ESIX技术最终锂回收率达到94.51%。
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