废锂离子电池中集流体与活性物质的分离-中国有色金属学报.PDFVIP

第 17 卷第 6 期 中国有色金属学报 2007 年 6 月 Vol.17 No.6 The Chinese Journal of Nonferrous Metals Jun. 2007 文章编号：1004-0609(2007)06-0997-05 废锂离子电池中集流体与活性物质的分离 卢毅屏，夏自发，冯其明，龙 涛，欧乐明，张国范 ( 中南大学 资源加工与生物工程学院，长沙 410083) 摘 要：针对废旧锂离子电池回收工艺中电极集流体的分离问题，根据集流体、活性物质、粘结剂的物理化学性 质差异，对高温焙烧法、物理擦洗法和稀酸浸出−搅拌擦洗法分离集流体与活性物质进行研究。结果表明：高温 焙烧与物理擦洗法都不能完全使集流体分离出来，而通过稀酸溶解−搅拌擦洗联合作用分离效果良好，在硫酸浓 度为 0.5 mol/L、固液比 1׃10、搅拌速度200 r/min 、反应时间为40 min 的条件下，可以实现正负极活性物质与集 流体的分离，铝箔和铜箔可直接作为产品回收，只有极少部分进入浸出液，浸出渣用硫酸再浸，可以使钴、锂全 部溶出，净化除杂后可回收钴和锂。 关键词：废锂离子电池；集流体；活性物质；稀酸浸出 中图分类号：TM 912.9 ；X 705 文献标识码：A Separation of current collectors and active materials from spent lithium-ion secondary batteries LU Yi-ping, XIA Zi-fa, FENG Qi-ming, LONG Tao, OU Le-ming, ZHANG Guo-fan (School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The separation and recovery of valuable metals from spent lithium-ion battery were investigated. Based on different physical and chemical properties among the current collectors, active materials and binder, three methods, high-temperature calcination, stirring scrubbing and dilute acid leaching with stirring scrubbing, were used to study the separation of active materials from current collectors. Factors influencing this process such as leaching concentration, reaction time and the ratio of liquid to solid were studied. The results show that the high-temperature calcination and stirring scrubbing are invalid because the current collectors and active materials can not be separated. The dilute acid leaching with stirring