消耗的电池的闭环阴极循环回收利用绿色深层环氧溶剂和酸
Zhicun Zhou1, Fan Lei1, Mingzhu Dai1
1Research Center of Lake Restoration Technology Engineering for Universities of Yunnan Province, School of Chemical Science and Technology, School of Materials and Energy, Yunnan University, No. 2, Cuihu North Road, Kunming 650091, China.
Journal of hazardous materials
|July 16, 2025
概括
这项研究介绍了一种绿色的深溶解溶剂 (DES),用于从使用过的离子电池中回收关键金属. 这种环保的方法实现了高的提取效率,并使可再生的有价值的正极前体循环经济.
科学领域:
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
- 水电金术是指用水电金术进行金术.
背景情况:
- 使用过的离子电池 (LIB) 带来了环境挑战.
- 战略性金属 (,,,) 的有效回收对于循环经济目标至关重要.
- 目前的回收方法往往涉及危险化学品和高成本.
研究的目的:
- 开发一个环保和高效的深层环氧溶剂 (DES) 来从NCM阴极中回收战略性金属.
- 使用响应表面方法 (RSM) 来优化漏参数.
- 建立一个连续的分离策略,用于再生高纯度的正极前体.
主要方法:
- 使用了由酸 (CA) 和胆化物 (ChCl) 组成的化DES.
- 通过RSM优化漏参数 (温度,时间,液体/固体比) .
- 研究了提取动力学和DES可重复使用性.
- 采用了顺序的共同沉和选择性的氧化酸盐回收.
- 应用密度函数理论 (DFT) 来获得机械学的见解.
主要成果:
- 获得了高的提取效率:97.75%的,99.57%的,99.91%的,99.56%的.
- 在提取动力学中确定了表面反应控制.
- 在多个循环中证明了出色的DES重复使用性.
- 成功再生了高纯度的三元阴极前体.
- DFT计算阐明了金属-DES相互作用.
结论:
- 开发的DES系统提供了一种可持续且具有成本效益的解决方案,用于从已使用的LIB中回收关键金属.
- 这个过程尽量减少了危险化学品的使用.
- 这些发现支持这种DES的可扩展性,用于电池回收的工业应用.
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