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
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摘要
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_xCo_yMn_(1-x-y)O_2 cathode material production process from spent batteries was studied.LiNi_xCo_yMn_(1-x-y)O_2 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, LiNi1/3 Co1/3 Mn1/3 O2 synthesized at 900-950 ℃ shows highest capacity and excellent cycling performance, and the capacity increases as the Ni content increasing in materials.
Recycling LiNi_xCo_yMn_(1-x-y)O_2 cathode material production process from spent batteries was studied.LiNi_xCo_yMn_(1-x-y)O_2 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, LiNi1/3 Co1/3 Mn1/3 O2 synthesized at 900-950 ℃ shows highest capacity and excellent cycling performance, and the capacity increases as the Ni content increasing in materials.
引文
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[2]王仁祺.废旧锂离子电池中钴的回收[J].电源技术,2012,36(4):587-589.
[3]刘展,朱浩,郑茹娟,等.以废旧锂离子电池为钴源制备Li Co O2[J].电池,2014,44(5):252-255.
[4]满伯乾.萃取法从废旧锂离子电池回收钴[J].科技与生活,2010(9):130-131.
[5]徐源来,徐盛明,池汝安,等.废旧锂离子电池正极材料回收工艺研究[J].武汉工程大学学报,2008,30(4):46-50.
[6]孙晓玮.废旧二次电池利用过程中的超细钴粉及镍钴合金粉的制备技术研究[D].北京:清华大学,2008:1-93.
[7]徐源来.典型有色金属二次资源的循环利用工艺研究[D].武汉:武汉工程大学,2008:1-68.