退役动力电池回收再利用碳足迹研究

Carbon footprint of retired traction battery recycling and reusing

以《温室气体产品碳足迹量化要求和指南》(ISO 14067:2018)为依据,以等量镍资源生产1 t高镍镍钴锰酸锂(NCM811)电池的正极材料为目标,对新能源汽车动力电池行业退役低镍镍钴锰酸锂(NCM111)电池回收再利用过程的碳足迹进行研究。计算得到,通过回收NCM111电池生产1 t NCM811电池的正极材料净温室气体排放量为18.4 t(以CO_(2)当量计),比正常使用原生材料生产1 t NCM811电池的正极材料可以减少36.3%的温室气体排放量。建议NCM811电池正极材料生产过程中关注氢氧化钠和电的温室气体减排。假设全部使用绿色能源,通过回收NCM111电池生产1 t NCM811电池的正极材料净温室气体排放量则将减少90.7%。

Based on“Greenhouse gas-carbon footprint of products-requirements and guidelines for quantification”(ISO 14067:2018),carbon footprint by recycling and reusing retired NCM111 battery in industry of traction battery for new energy vehicles was studied in order to gain 1 t NCM811 battery anode material by recycling the same quantity of nickel.Calculation results showed that net greenhouse gas emission was 18.4 t equivalent CO_(2),when recycling and reusing NCM111 battery,decreased by 36.3%compared with using virgin materials.It was suggested that greenhouse gas reduction of sodium hydroxide and electricity power should be focused when NCM811 battery anode material production.If introducing 100%green energy,net greenhouse gas emission would decrease by 90.7%,when recycling and reusing NCM111 battery.