摘要
针对废旧磷酸铁锂锂离子电池回收工艺中电极材料的分离提取问题,根据集流体、活性物质、粘结剂的物理化学性质差异,通过高温焙烧、碱溶解、酸浸出并结合搅拌筛分等分离手段,对磷酸铁锂正极材料中各成分进行分离提取,从废旧磷酸铁锂电池中回收铝、铁和锂。实验结果表明:对正极极片进行焙烧,碱溶解可预先分离约92%的铝,其次用H2SO4+H2O2体系通过控制pH值可分离95%以上的铁;余液在90℃以上用饱和热碳酸钠溶液沉积碳酸锂,一次沉积锂率可达80%以上。
The separation and recovery of valuable metals from spent lithium iron phosphate batteries were investigated. Based on different physical and chemical properties among the current collectors, active materials and binder, high-temperature calcination, alkali dissolution and dilute acid leaching with stirring screening, were used to study the separation of active materials from current collectors. The results show that more than 92% of aluminum can be removed by alkali dissolution, leaching efficiency of more than 95% of iron could be achieved when H2SO4＋H2O2 solution is used, and more than 80% of lithium in the remaining solution is recovered as lithium carbonate by the addition of saturated sodium carbonate solution at 90 ℃.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第4期629-631,共3页
Chinese Journal of Power Sources
关键词
磷酸铁锂电池
回收
碳酸锂
lithium iron phosphate batteries
recycling
lithium carbonate
作者简介
吴越（1966-）,男,江西省人,高级工程师,主要研究方向为电动汽车动力电池梯次利用技术.
