Life cycle assessment of LiCoO2 battery recycling for mobile phones
In order to assess the differences in environmental impact of the two recycling processes(pyrometallurgical and hydrometallurgical)and different allocation methods(EoL and CFF)for lithium cobalt oxide(LCO)batteries used in mobile phones,when considering the environmental benefits of the waste battery recycling and setting the functional unit to be the energy supply of 1 kWh from lithium cobalt oxide batteries,a cradle-to-grave life cycle assessment(LCA)was carried out for the LCO batteries,while the results were compared for the application of End-of-Life(EoL)and Circular Footprint Formula(CFF)allocation methods in the scenario of hydrometallurgical recycling process.The results indicated that the environmental benefits of hydrometallurgical recycling process were significantly greater than those of pyrometallurgical recycling process,which were about 2.89 times.Regarding Global Warming Potential and Fossil Resource Scarcity as well as three end points environmental damage indicators,the environmental benefits of EoL allocation were much lower than those of CFF allocation.The main reason was that the EoL allocation method counted all recycling benefits into the initial life cycle,compared to the CFF allocation method,which reasonably divided the environmental benefits of recycling into the life cycles of manufacturing recyclable materials and utilizing recycled materials according to the market situation.The CFF method proved to be more efficacious in mitigating the arbitrary disappearance of environmental impacts and avoiding the multi-counting of environmental benefits,which notably affected the accuracy of scientific quantification of environmental impacts,including the carbon emission assessment.It was also recommended to establish domestic localisation policy guidelines with reference to the lithium battery related standards(CFF)in the EU PEF to ensure the comparability of related lithium battery research.
万方数据
维普
