Vacuum pyrolysis and hydrometallurgical process for the recovery of valuable metals from spent lithium-ion batteries
Vacuum pyrolysis and hydrometallurgical process for the recovery of valuable metals from spent lithium-ion batteries
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DOI：
10.1016/j.jhazmat.2011.07.114
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发表时间：
2011-10-30
影响因子：
13.6
通讯作者：
Qiu, Keqiang
中科院分区：
文献类型：
--
作者：
Sun, Liang;Qiu, Keqiang
废旧锂离子电池中含有大量的钴、锂等战略资源以及其他有害物质，是极具吸引力的二次资源和环境污染物。本研究开发了一种真空热解-湿法冶金联合回收废旧锂离子电池中钴和锂的新工艺。阴极材料的真空热解结果表明，在温度为600 ℃、真空蒸发时间为30 min、残余气体压力为1.0 kPa的实验条件下，由LiCoO（2）和CoO组成的阴极粉末可完全从铝箔上剥离。在温度80 ℃、固液比50 g L（-1）、时间60 min条件下，采用2 M硫酸浸出液对剥离后的钴锂氧化物进行浸出，钴锂回收率可达99%以上。该技术为废旧锂离子电池中有价物质的回收提供了一条有效途径，具有规模化应用的可行性，有利于减少废旧锂离子电池对环境的污染。(C)2011 Elsevier B. V.保留所有权利。
Spent lithium-ion batteries contain lots of strategic resources such as cobalt and lithium together with other hazardous materials, which are considered as an attractive secondary resource and environmental contaminant. In this work, a novel process involving vacuum pyrolysis and hydrometallurgical technique was developed for the combined recovery of cobalt and lithium from spent lithium-ion batteries. The results of vacuum pyrolysis of cathode material showed that the cathode powder composing of LiCoO(2) and CoO peeled completely from aluminum foils under the following experimental conditions: temperature of 600 degrees C, vacuum evaporation time of 30 min, and residual gas pressure of 1.0 kPa. Over 99% of cobalt and lithium could be recovered from peeled cobalt lithium oxides with 2 M sulfuric acid leaching solution at 80 degrees C and solid/liquid ratio of 50 g L(-1) for 60 min. This technology offers an efficient way to recycle valuable materials from spent lithium-ion batteries, and it is feasible to scale up and help to reduce the environmental pollution of spent lithium-ion batteries. (C) 2011 Elsevier B.V. All rights reserved.