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从混合使用的LFP-NMC电池中通过大气中的水浸出回收

Indra Perdana¹, Doni Riski Aprilianto², Farika Asna Fadillah²

¹Sustainable Mineral Processing Research Group, Department of Chemical Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Yogyakarta, 55281, Republic of Indonesia. iperdana@ugm.ac.id.

Scientific reports

|January 20, 2025

概括

添加碳酸显著改善了混合LFP-NMC电池中的回收. 这种方法增强了选择性提取,这对于有效回收使用过的电池至关重要.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
环境科学环境科学

背景情况:

回收混合电池类型,如LFP和NMC,由于其独特的化学成分和结构,提出了挑战.
现有的方法难以从这些混合物中选择性回收,导致效率低下.
开发一个统一的,有效的循环回收途径,用于各种消耗电池对于资源可持续性至关重要.

研究的目的:

研究一种碳热还原和水浸出方法,用于从混合LFP-NMC电池黑质中选择性回收.
为了解决在混合LFP-NMC电池回收中观察到的低回收率.
评估碳酸作为增强回收的添加剂的有效性.

主要方法:

在大气条件下采用碳热减排,然后用水水.
为单个NMC黑质量优化碳热减热条件 (温度,加热速率,时间).
引入碳酸作为添加剂,以减轻混合LFP-NMC黑质中不溶性化合物的形成.

主要成果:

在最佳的碳热条件下,实现了95.7%的回收,对单个NMC黑质量具有100%的选择性.
混合LFP和NMC黑质量 (50:50比) 极大降低了回收,由于不溶性Li3PO4形成,回收率降至9.78%.
将Na2CO3添加到混合黑质中,通过形成可溶性Li2CO3.3,提高了的回收率至59.47%,具有100%的选择性.

结论:

碳热还原与水浸相结合,对于单个电池类型是有效的,但对于混合物需要修改.
不溶性Li3PO4的形成是从混合LFP-NMC黑质中恢复的主要障碍.
碳酸的添加是稳定作为可溶性化合物的有希望的策略,显著改善混合LFP-NMC电池的回收,并使有效的回收利用.

关键词:

的回收可能是的回收.混合电池是一种混合电池.减少碳热热的减少选择性的选择性水的泄漏,就是水的泄漏.

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