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Exploring separation techniques for the direct recycling of high voltage spinel LNMO scrap electrodes
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2024-12-17 , DOI: 10.1039/d4ta07642g
Stiven López Guzmán, Marcus Fehse, Emanuele Gucciardi, Marta Cabello, Silvia Martin, Naiara Etxebarria, Miguel Ceja, Miriam Romera, Montse Galceran, Marine Reynaud

Among various recycling methods, direct recycling has emerged as a promising approach for recovering battery materials and directly reusing them to reduce carbon emissions and enhance the sustainability of the battery production process. Our study unveils, for the first time, different separation techniques for the delamination and the efficient direct recycling of high-voltage spinel LiNi0.5Mn1.5O4 (LNMO) cathode materials from scrap electrodes, evaluating chemical, mechanical, and thermal separation techniques. The impact of the separation technique on the active material and the influence of the particle morphology and binder type (aqueous and organic solvent) on the outcomes of these separation techniques is assessed in terms of recovery yield, purity, and electrochemical performance. The recovered materials' physicochemical properties show minimal alterations after the recycling process. The investigated separation techniques allow the complete delamination of the electrodes and the recovery of around 90% of the active material. The recovered LNMO is used without further treatment for preparing new electrodes, which achieve 95% of the cycling capacity of pristine LNMO after 100 charge/discharge cycles. These lab-scale findings are validated on pre-pilot-line and commercial production-line-processed electrode scraps.

中文翻译:


探索直接回收高压尖晶石 LNMO 废电极的分离技术



在各种回收方法中,直接回收已成为一种很有前途的回收电池材料并直接再利用它们以减少碳排放并提高电池生产过程的可持续性的方法。我们的研究首次揭示了从废电极中分层和高效直接回收高压尖晶石LiNi 0.5Mn1.5O4 (LNMO) 阴极材料的不同分离技术,评估了化学、机械和热分离技术。分离技术对活性材料的影响以及颗粒形态和粘合剂类型(水性和有机溶剂)对这些分离技术结果的影响,从回收率、纯度和电化学性能方面进行评估。回收材料的物理化学性质在回收过程后表现出最小的变化。所研究的分离技术允许电极完全分层并回收约 90% 的活性材料。回收的 LNMO 无需进一步处理即可用于制备新电极,在 100 次充电/放电循环后,新电极的循环容量达到原始 LNMO 的 95%。这些实验室规模的发现在试产线和商业生产线加工的电极废料上得到了验证。
更新日期:2024-12-17
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