Selective Extraction of Transition Metals from Spent LiNi<sub><i>x</i></sub>Co<sub>y</sub>Mn<sub>1−<i>x</i>−<i>y</i></sub>O<sub>2</sub> Cathode via Regulation of Coordination Environment
Xin Chang, Min Fan, Chao‐Fan Gu, Wei‐Huan He, Qinghai Meng, Li‐Jun Wan, Yu‐Guo Guo
Abstract
Abstract The complexity of chemical compounds in lithium‐ion batteries (LIBs) results in great difficulties in the extraction of multiple transition metals, which have similar physicochemical characteristics. Here, we propose a novel strategy for selective extraction of nickel, cobalt, and manganese from spent LiNi x Co y Mn 1− x − y O 2 (NCM) cathode through the regulation of coordination environment. Depending on adjusting the composition of ligand in transition metal complexes, a tandem leaching and separation system is designed and finally enables nickel, cobalt, and manganese to enrich in the form of NiO, Co 3 O 4 , and Mn 3 O 4 with high recovery yields of 99.1 %, 95.1 %, and 95.3 %, respectively. We further confirm that the combination of different transition metals with well‐designed ligands is the key to good selectivity. Through our work, fine‐tuning the coordination environment of metal ions is proved to have great prospects in the battery recycling industry.