退役磷酸铁锂电池梯次利用生命周期评价与碳减排情景分析

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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.

Key words： retired lithium iron phosphate battery cascade utilization life cycle assessment environmental impact carbon emission reduction

Received: 15 December 2023

PACS:

X705

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	Articles by authors
	DOU Yong-qi
	SONG Xiao-long
	ZHUANG Xu-ning
	WU Wen-jie
	FAN Shuai-kang

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DOU Yong-qi,SONG Xiao-long,ZHUANG Xu-ning等. Life cycle assessment and carbon reduction scenario analysis of retired lithium iron phosphate batteries for cascade utilization[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 4091-4100.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2024/V44/I7/4091

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