废旧LiFePO_4电池循环利用的可行性研究
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摘要
对废旧LiFePO_4电池循环利用的可行性进行了研究。结果表明:通过放电、拆解、破碎、分选、浸泡、正极分离的回收工艺流程,对汽车用LiFePO_4电池中的组分材料进行分类回收,可达到较高的资源回收率;废旧LiFePO_4电池正极在80℃下浸泡4 h,可实现铝箔与正极材料混合物完全分离;烧结温度为700℃时所得再生产物在结晶度、首次充放电、循环性能、电荷传递电阻等方面表现优异;采用本实验所述方法能对废旧LiFePO_4电池中的正极材料进行有效回收,并且再生制作的LiFePO_4电池的电化学性能良好,有效地实现了废旧LiFePO_4电池的循环利用。
The feasibility of recycling utilization of waste LiFePO_4 battery was studied. The results showed that the component materials in the automobile LiFePO_4 battery can be classified and recovered to achieve a high resource recovery rate through the recovery process of discharge, disassembly, crushing, sorting, soaking and positive pole separation. When the anode of waste LiFePO_4 battery was immersed at 80 ℃ for 4 h, the aluminum foil and anode materials can be completely separated. The regenerated products obtained at the sintering temperature of 700 ℃ exhibited excellent performance in crystallinity, first charge and discharge, cycle performance, charge transfer resistance, etc. The anode materials in the waste LiFePO_4 battery can be effectively recycled by using the method described in this experiment, and the regenerated LiFePO_4 battery possessed good electrochemical properties, thus realizing the recycling utilization of waste LiFePO_4 battery.
The feasibility of recycling utilization of waste LiFePO_4 battery was studied. The results showed that the component materials in the automobile LiFePO_4 battery can be classified and recovered to achieve a high resource recovery rate through the recovery process of discharge, disassembly, crushing, sorting, soaking and positive pole separation. When the anode of waste LiFePO_4 battery was immersed at 80 ℃ for 4 h, the aluminum foil and anode materials can be completely separated. The regenerated products obtained at the sintering temperature of 700 ℃ exhibited excellent performance in crystallinity, first charge and discharge, cycle performance, charge transfer resistance, etc. The anode materials in the waste LiFePO_4 battery can be effectively recycled by using the method described in this experiment, and the regenerated LiFePO_4 battery possessed good electrochemical properties, thus realizing the recycling utilization of waste LiFePO_4 battery.
引文
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[2] 王洪彩,郑茹娟,贾铮,等.废旧锂离子电池资源化回收及再利用发展动态[J].电池工业,2013,18(3):173-176.
[3] CHEN X,ZHOU T.Hydrometallurgical process for the recovery of metal values from spent lithium-ion batteries in citric acid media[J].Waste management research,2014,32(11):1083-1093.
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[5] 赵飞.锂离子电池正极材料LiFePO4的制备及其改性研究[D].合肥:合肥工业大学,2010.