三元锂电池黄铁矿硫酸化焙烧选择性提锂研究-中国材料进展

文章信息/Info

Title:: Study on Selective Lithium Extraction from Pyrite Sulfation Roasting in Ternary Lithium Batteries

Author(s):: LI Zongrun; ZHONG Yuanyuan; LI Pengfei; ZOU Jingtian; LU Xinyu; WANG Xiaowei; ZHANG Jiafeng; School of Metallurgy and Environment, Central South University，Changsha 410083，China

Keywords:: spent lithium-ion batteries; selective lithium extraction; sulfation roasting; pyrite; lithium carbonate

摘要:: 随着新能源汽车的迅猛普及，锂盐需求呈现急剧增长，进而制约了锂离子电池的快速发展。如何高效回收废旧锂离子电池中的锂元素成为缓解这一矛盾的重要课题。然而，现有的回收工艺更加偏向对镍和钴等金属的回收，导致锂元素在漫长的湿法与冶金工序中损耗严重，回收率较低。针对上述问题，提出采用黄铁矿硫酸化焙烧水浸法的高效选择性提锂回收方案，以从废旧锂离子电池的三元正极材料中回收锂元素并实现再生利用。该方法不仅缩短了锂回收流程，实现了9868%的锂回收率，还成功完成了合成碳酸锂的高效增值利用，为废旧锂离子电池中锂元素的回收利用研究提供了有益的借鉴。

Abstract:: With the rapid proliferation of new energy vehicles, there is a considerable surge in demand for lithium salts, consequently imposing constraints on the advancement of lithium-ion batteries. Addressing this issue, the efficient recuperation of lithium from spent lithium-ion batteries emerges as a pivotal solution. Notably, prevailing recovery techniques predominantly prioritize nickel and cobalt retrieval, often culminating in substantial lithium losses and diminished recovery rates during protracted wet and pyrometallurgical processes. Against this backdrop, this study advocates the utilization of the pyrite sulfation roasting water immersion method for the proficient and selective extraction of lithium from waste lithium-ion battery ternary cathode materials. This approach curtails the lithium recovery timeline, achieved a lithium recovery rate of 98.68%, and accomplishes a value-added and productive utilization of lithium by synthesizing the lithium carbonate. The outcomes offer valuable insights into the domain of lithium recovery from discarded lithium-ion batteries, carrying significance for future research endeavors in this sphere.