废旧锂离子电池再生制备LiNi_xCo_yMn_(1-x-y)O_2正极材料及其性能

Recycling production of LiNi_xCo_yMn_(1-x-y)O_2 cathode material from spent Li-ion battery and its performance

对利用废旧锂离子电池,再生制备镍钴锰酸锂正极材料的工艺进行研究。废旧电池经拆解、破碎、浸出、中和、萃取、深度除杂、共沉淀及高温合成等工序,可再生制得镍钴锰酸锂正极材料。使用化学滴定和分光光度法分析常量元素,ICP-AES分析微量元素,S EM、XRD表征材料的形貌和物相,纽扣电池和聚合物电池测试材料的电化学性能。研究表明,在900~950℃的反应温度下,可以再生制备出具有较高容量和优异循环性能的镍钴锰酸锂正极材料。LiNi_xCo_yMn_(1-x-y)O_2系列正极随着Ni含量的增加,容量逐渐增加,而工作电压逐渐降低。

Recycling LiNi Co Mn1-O2 cathode material production process from spent batteries was studied.LiNi Co Mn1-O2 cathode material could be manufactured from spent batteries by a process containing disassembly,fragmentation,leaching,neutralization,extraction,purification,coprecipitaton and high temperature solid synthesis steps.The macro-constitutes were analyzed by TA and SP,the micro-constitutes were analyzed by ICP-AES,and the morphology and compound phase were characterized by SEM and XRD.And coin cells and polymer cells were assembled to test the electrochemical performance of materials.The results indicate that,LiNi1/3Co1/3Mn1/3O2 synthesized at 900-950℃shows highest capacity and excellent cycling performance,and the capacity increases as the Ni content increasing in LiNi Co Mn1-O2 materials.