湿法冶金2024，Vol.43Issue(6)：624-629,6.DOI:10.13355/j.cnki.sfyj.2024.06.005
废旧三元锂离子电池正极材料的酸浸回收与再生试验研究
Acid Leaching Recovery and Regeneration of Waste Ternary Lithium Ion Battery Cathode Materials
摘要
Abstract
The recovery of valuable components from waste ternary lithium batteries and the regeneration of electrode materials were systematically studied.The recovery of valuable components such as Ni,Co,Mn and Li was carried out by using the route of acid leaching—impurity removal—co-precipitation—high temperature solid phase synthesis.The effects of H2SO4 concentration and H2O2 adding dosage on acid leaching were investigated.The pH of the leaching solution was adjusted by NaOH to remove Fe2+and Al3+impurities,and then the cathode material precursor of ternary lithium battery was synthesized and the active material of the precursor was regenerated,and the electrochemical properties of the regenerated cathode material were discussed.The results show that the leaching rates of Ni2+,Co2+,Mn2+and Li+are 99.7％,99.1％,97.2％and 99.5％,respectively,using 0.3 mol/L H2SO4 and 8％H2O2 as acid leaching agents.Under the condition of pH=4.5～6.5,it can completely precipitate and remove impurities such as Fe2+and Al3+,and Ni2+,Co2+and Mn2+can be completely precipitated to obtain precursors as the pH rises to 10.0.The cathode material can be regenerated by adding lithium source.The electrochemical performance test results show that at 1 C current density,the specific capacity of ternary lithium battery can reach 143.7 mAh/g for 1 discharge cycle.The performance is stable after 100 cycles,and the CV curve has obvious redox peaks,and the cyclic discharge performance is good at different rates.关键词
废旧三元锂电池/前驱体/正极材料/有价金属/硫酸/浸出/回收/再生Key words
waste ternary lithium battery/precursors/cathode materials/valuable ingredients/sulphuric acid/leaching/recovery/regeneration分类
矿业与冶金引用本文复制引用
白一含,苏梦,王文哲,李发闯,郭战永,王洪波,马大千,蔡敬雯..废旧三元锂离子电池正极材料的酸浸回收与再生试验研究[J].湿法冶金,2024,43(6):624-629,6.基金项目
河南省科技攻关项目(242102321162) （242102321162）
河南自然科学基金资助项目(242300420015) （242300420015）
河南工学院博士科研启动经费资助项目(KY1704). （KY1704）
