Life cycle assessment and carbon reduction scenario analysis of retired lithium iron phosphate batteries for cascade utilization
DOU Yong-qi1, SONG Xiao-long1,2, ZHUANG Xu-ning1,2, WU Wen-jie1,2, FAN Shuai-kang1
1. School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, China; 2. Shanghai Collaborative Innovation Center for WEEE Recycling, Shanghai 201209, China
Abstract：The paper takes lithium iron phosphate batteries as research object, by considering the proportion of cascade utilization, life cycle and battery capacity, different cascade utilization scenarios are set, then the environmental impact of retired power batteries in the cascade utilization and subsequent disposal is quantified by using life cycle assessment method, and the carbon emission reduction under different cascade utilization rate scenarios is analyzed. The results indicate that compared to direct recycling, the three cascade utilization scenarios of energy storage, communication base stations and low-speed power supply all show environmental benefits. Among them, the energy storage scenario has the greatest environmental benefits, showing relative advantages in environmental impact indicators such as climate change, fossil energy consumption, human toxicity-non carcinogenic and terrestrial ecotoxicity. Based on the retirement amount of battery retirement and the direction of cascade utilization, the paper further calculates the carbon reduction for the cascade utilization of lithium iron phosphate batteries in 2023 is 1.05×108kg CO2eq. When the cascade utilization rate remains at the current level or increases by 10%, the annual carbon reduction in 2023 can reach 1.55×109kg CO2eq. and 5.98×109kg CO2eq. The cascade utilization has good performance in reducing pollution and carbon emissions.
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