石墨对通过降解从NCM-电池黑质中选择性回收的影响
Kunpeng Xu1, Zhe Wang1, Bolin Sun1
1State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, 100083, Beijing, China.
Journal of environmental management
|September 23, 2025
概括
这项研究成功地利用减少的方法从已耗尽的离子电池中回收,达到92.02%的效率. 这种方法即使存在阳极石墨也可行,为回收宝贵的电池材料提供了一条新的途径.
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:
- 使用过的离子电池给环境带来了挑战,并损失了宝贵的资源.
- 目前的回收方法往往只关注阴极材料,忽视混合废物流.
- 从三元离子电池中混合阴极-阳极材料的降解是一个尚未探索的领域.
研究的目的:
- 调查使用降解的三元离子电池混合阴极和阳极材料的优先提取的可行性.
- 确定回收的最佳条件,并了解阳极石墨在该过程中的作用.
- 为工业规模的离子电池回收提供理论基础.
主要方法:
- 使用过的三元离子电池材料 (阴极和阳极) 经过在不同温度下进行降处理.
- 确定了区分和碳减排的临界温度.
- 确定了最佳的减少条件 (温度,时间,流量),然后进行水出,以回收.
主要成果:
- 确定了500°C的临界温度,在此以下,降解占主导地位,而在此以上,碳降解变得显著.
- 在最佳条件下 (500°C,60分,150毫升/分钟H2),阴极材料被减少到LiOH,Co,Ni和MnO.
- 通过随后的水浸实现了92.02%的高回收效率.
- 残留物中的大多数金属元素都被降低到最低的氧化状态,从而使潜在的进一步回收成为可能.
结论:
- 减少是有效的优选提取混合阴极-阳极材料在消耗的三元离子电池.
- 阳极石墨的存在不会阻碍,而是集成到回收的降解过程中.
- 这种方法为离子电池的工业回收提供了一个有希望和高效的方法,提高了资源的可持续性.
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